drop your trousers
drop (one's) trousers
To lower one's pants, typically in a public setting. I know you're drunk, but you can't drop your trousers out here! The doctor asked me to drop my trousers so he could give me the shot.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
drop your trousersdeliberately let your trousers fall down, especially in a public place.
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