- noun a woman’s breast
- noun jail. An item of prison slang from the 1990s, probably a shortened version of booby hatch in the sense of an institution in which one becomes crazy.
- verb to blunder, commit a gaffe or error. The verb to boob, based on the earlier nouns ‘booby’ and ‘boob’ in the sense of a fool, has been in use since before World War II, the reduplicated form boo-boo since the 1960s.