While there are many slightly different definitions of acids and bases, in this lesson we will introduce the fundamentals of acid/base chemistry. Acids taste sour, are corrosive to metals, change litmus (a dye extracted from lichens) red, and become less acidic when mixed with bases.
Noun[edit] grease monkey â(plural grease monkeys) (idiomatic, slang) A mechanic, often with the specific connotation of an automobile mechanic.
Elbow grease is an idiom that's been around for hundreds of years in several languages. Although it conjures up the image of strenuous use of the arm, such as might occur during scrubbing or cleaning, it is generally used to refer to any sort of hard work or manual labor.