Definitions
1.nounA shout or whistle expressing dislike, especially from a crowd or audience; a jeer, a boo.
2.nounA shout, whistle, or comment of a sexual nature, usually made toward a passing woman.
3.nounA whistle blown by a theatre-goer to express disapproval.
4.verbTo make such an exclamation.
5.nounIn the Eiffel programming language, a run-time error caused by use of the wrong data type.