crib means: (1) a cot for a baby (2) To copy. For example on the bus on the way to school "Let me crib your homework and I'll give you a pack of toffos?". Also during exams either by furtive glances at the adjacent kid next to you (if possible you would try to position yourself next to the swottiest kid in the class) or assisted by crib notes (usually written on skin - for quick rub removal) or by crib sheets (small pieces of paper easily eaten if discovered). (3) a home that is not your own. Used as "Hey are we crashing at your crib tonight?".