a thin, crisp biscuit.
(initial capital letter) Sometimes Disparaging and Offensive. a native or inhabitant of Georgia (used as a nickname).
Slang: Disparaging and Offensive. a poor white person living in some rural parts of the southeastern U.S.
snapper ( def 5 ).
braggart; boaster.
a person or thing that cracks.
a chemical reactor used for cracking. Compare catalytic cracking, fractionator.
crackers, Informal. wild; crazy: They went crackers over the new styles.

1400–50; late Middle English craker. See crack, -er1; (defs 4–5) perhaps orig. in sense “braggart,” applied to frontiersmen of the southern American colonies in the 1760s, though subsequently given other interpretations (cf. corn-cracker); for crackers crazy, cf. cracked, -ers Unabridged


verb (used without object)
to break with a sudden, sharp sound: The branch cracked under the weight of the snow.
to make a sudden, sharp sound in or as if in breaking; snap: The whip cracked.
(of the voice) to break abruptly and discordantly, especially into an upper register, as because of weariness or emotion.
to fail; give way: His confidence cracked under the strain.
to succumb or break down, especially under severe psychological pressure, torture, or the like: They questioned him steadily for 24 hours before he finally cracked.
Chemistry. to decompose as a result of being subjected to heat.
Chiefly South Midland and Southern U.S. to brag; boast.
Chiefly Scot. to chat; gossip.
verb (used with object)
to cause to make a sudden sharp sound: The driver cracked the whip.
to break without complete separation of parts; break into fissures.
to break with a sudden, sharp sound: to crack walnuts.
to strike and thereby make a sharp noise: The boxer cracked his opponent on the jaw.
to induce or cause to be stricken with sorrow or emotion; affect deeply.
to utter or tell: to crack jokes.
to cause to make a cracking sound: to crack one's knuckles.
to damage, weaken, etc.: The new evidence against him cracked his composure.
to make mentally unsound.
to make (the voice) harsh or unmanageable.
to solve; decipher: to crack a murder case.
Informal. to break into (a safe, vault, etc.).
Chemistry. to subject to the process of cracking, as in the distillation of petroleum.
Informal. to open and drink (a bottle of wine, liquor, beer, etc.).
a break without complete separation of parts; fissure.
a slight opening, as between boards in a floor or wall, or between a door and its doorpost.
a sudden, sharp noise, as of something breaking.
the snap of or as of a whip.
a resounding blow: He received a terrific crack on the head when the branch fell.
Informal. a witty or cutting remark; wisecrack.
a break or change in the flow or tone of the voice.
Informal. opportunity; chance; try: Give him first crack at the new job.
a flaw or defect.
Also called rock. Slang. pellet-size pieces of highly purified cocaine, prepared with other ingredients for smoking, and known to be especially potent and addicting.
Masonry. check1 ( def 41 ).
a mental defect or deficiency.
a shot, as with a rifle: At the first crack, the deer fell.
a moment; instant: He was on his feet again in a crack.
Slang. a burglary, especially an instance of housebreaking.
Chiefly British. a person or thing that excels in some respect.
Slang: Vulgar. the vulva.
Chiefly Scot. conversation; chat.
British Dialect. boasting; braggadocio.
Archaic. a burglar.
first-rate; excellent: a crack shot.
with a cracking sound.
Verb phrases
crack down, to take severe or stern measures, especially in enforcing obedience to laws or regulations: The police are starting to crack down on local drug dealers.
crack off, to cause (a piece of hot glass) to fall from a blowpipe or punty.
crack on, Nautical.
(of a sailing vessel) to sail in high winds under sails that would normally be furled.
(of a power vessel) to advance at full speed in heavy weather.
crack up, Informal.
to suffer a mental or emotional breakdown.
to crash, as in an automobile or airplane: He skidded into the telephone pole and cracked up.
to wreck an automobile, airplane, or other vehicle.
to laugh or to cause to laugh unrestrainedly: That story about the revolving door really cracked me up. Ed cracked up, too, when he heard it.
crack a book, Informal. to open a book in order to study or read: He hardly ever cracked a book.
crack a smile, Informal. to smile.
crack wise, Slang. to wisecrack: We tried to be serious, but he was always cracking wise.
fall through the cracks, to be overlooked, missed, or neglected: In any inspection process some defective materials will fall through the cracks. Also, slip between the cracks.
get cracking, Informal.
to begin moving or working; start: Let's get cracking on these dirty dishes!
to work or move more quickly.

before 1000; Middle English crak(k)en (v.), crak (noun), Old English cracian to resound; akin to German krachen, Dutch kraken (v.), and German Krach, Dutch krak (noun)

crackable, adjective
crackless, adjective Unabridged
Cite This Source Link To cracker
World English Dictionary
crack (kræk)
1.  to break or cause to break without complete separation of the parts: the vase was cracked but unbroken
2.  to break or cause to break with a sudden sharp sound; snap: to crack a nut
3.  to make or cause to make a sudden sharp sound: to crack a whip
4.  to cause (the voice) to change tone or become harsh or (of the voice) to change tone, esp to a higher register; break
5.  informal to fail or cause to fail
6.  to yield or cause to yield: to crack under torture
7.  (tr) to hit with a forceful or resounding blow
8.  (tr) to break into or force open: to crack a safe
9.  (tr) to solve or decipher (a code, problem, etc)
10.  informal (tr) to tell (a joke, etc)
11.  to break (a molecule) into smaller molecules or radicals by the action of heat, as in the distillation of petroleum
12.  (tr) to open (esp a bottle) for drinking: let's crack another bottle
13.  dialect (Scot), (Northern English) (intr) to chat; gossip
14.  informal (tr) to achieve (esp in the phrase crack it)
15.  informal (Austral) (tr) to find or catch: to crack a wave in surfing
16.  informal crack a smile to break into a smile
17.  informal (Austral), (NZ) crack hardy, crack hearty to disguise one's discomfort, etc; put on a bold front
18.  informal crack the whip to assert one's authority, esp to put people under pressure to work harder
19.  a sudden sharp noise
20.  a break or fracture without complete separation of the two parts: a crack in the window
21.  a narrow opening or fissure
22.  informal a resounding blow
23.  a physical or mental defect; flaw
24.  a moment or specific instant: the crack of day
25.  a broken or cracked tone of voice, as a boy's during puberty
26.  informal (often foll by at) an attempt; opportunity to try: he had a crack at the problem
27.  slang a gibe; wisecrack; joke
28.  slang a person that excels
29.  dialect (Scot), (Northern English) a talk; chat
30.  slang a processed form of cocaine hydrochloride used as a stimulant. It is highly addictive
31.  informal chiefly (Irish) Also: craic fun; informal entertainment: the crack was great in here last night
32.  obsolete, slang a burglar or burglary
33.  crack of dawn
 a.  the very instant that the sun rises
 b.  very early in the morning
34.  informal a fair crack of the whip a fair chance or opportunity
35.  crack of doom doomsday; the end of the world; the Day of Judgment
36.  slang (prenominal) first-class; excellent: a crack shot
[Old English cracian; related to Old High German krahhōn, Dutch kraken, Sanskrit gárjati he roars]

cracker (ˈkrækə)
2.  short for firecracker
3.  a thin crisp biscuit, usually unsweetened
4.  a person or thing that cracks
5.  (US) another word for poor White
6.  slang (Brit) a thing or person of notable qualities or abilities
7.  informal (Austral), (NZ) not worth a cracker worthless; useless

Collins English Dictionary - Complete & Unabridged 10th Edition
Cite This Source's 21st Century Lexicon
Main Entry:  cracker
Part of Speech:  n
Definition:  See Christmas cracker's 21st Century Lexicon
Copyright © 2003-2013, LLC
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Word Origin & History

O.E. cracian "make a sharp noise," from P.Gmc. *krakojan, probably onomatopoeic. The noun meaning "split, opening," is 14c. Meaning "try, attempt" first attested 1836, probably a hunting metaphor, from slang sense of "fire a gun." Meaning "rock cocaine" is first attested 1985. Cracked "mentally unsound"
is 17c. (though the equivalent Gk. word was used in this sense by Aristophanes), while crack as in "top-notch, superior" is slang from 1793. Crackpot "pretentious, worthless person" dates from 1883. The superstition that it is bad luck to step on sidewalk cracks has been traced to c.1890.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang Dictionary

crack definition

  1. n.
    the gap between the buttocks. : You wanna get kicked in the crack?
  2. n.
    the gap between the lips of the vulva. (Usually objectionable. See also crack-rack.) : He screamed something rude about her crack and slapped her.
  3. n.
    women considered as the object of copulation and male sexual release. (Usually with some. Rude and derogatory.) : Jed said he had to have some crack soon or he would die.
  4. n.
    a joke; a smart-aleck remark. : Another crack like that and your nose will be so reshaped.
  5. n.
    a try (that may or may not succeed). : Have another crack at it.
  6. n.
    a unit of something (for a particular price); a use (of something). : You would think twice, too, if you remembered that it's seven dollars a crack.
  7. n.
    crystalline, smokable cocaine. (Drugs.) : This crack seems to have become the drug of choice for punks of all ages.
  8. in.
    to break down and talk under pressure. (Underworld.) : They kept at her till she finally cracked and talked.
  9. mod.
    [of a person] excellent; top-flight. : The dealer's crack salesman was no help at all.
  10. tv.
    to break into something. (Underworld.) : We almost cracked the safe before the alarm went off.
Copyright 2007. Published by McGraw-Hill Education.
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Computing Dictionary

cracker definition

See also Computer Emergency Response Team, dark-side hacker, hacker ethic, phreaking, samurai, Trojan horse.
[Jargon File]

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