Meaning of “catch sb with their pants/trousers down” in the English Dictionary

british dictionary

"catch sb with their pants/trousers down" in British English

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catch sb with their pants/trousers down

to discover someone doing something that they want to keep secret, usually something sexual

to ask someone unexpectedly to do or say something that they are not prepared for

(Definition of “catch sb with their pants/trousers down” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)