From Longman Dictionary of Contemporary Englishboobyboo‧by /ˈbuːbi/ noun (plural boobies) [countable] informalSTUPID/NOT SENSIBLE a silly or stupid person
Examples from the Corpus
booby• Any half-blind booby can see it makes no sense.• Thereafter we had to put up with Crewe elegantly stringing passes together while our overpaid boobies struggled.Origin booby (1900-2000) → BOOB 