catch somebody with their trousers down
idiomPart oftrousers
catch somebody with their trousers down — idiom
1. To find someone unprepared for a situation, often causing them embarrassment.
1.idiom
Definition
To find someone unprepared for a situation, often causing them embarrassment.
Example
The sudden inspection caught the manager with his trousers down.
Did the pop quiz catch you with your trousers down?