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.
These children, covered in grease and crawling in the tight spaces in the ceilings, were equated with monkeys. Noun[edit] ( 1 idiomatic, slang) A mechanic, often with the specific connotation of an automobile mechanic.  I'm no grease monkey, but I can manage to change out my engine's spark plugs without assistance.