The American slang term for the gluteal cleft — the vertical groove between the buttocks. It's casual and mildly crass but widely understood across age groups, appearing in everything from kids' schoolyard teasing to adult comedy. The term is most often invoked when someone's pants ride low enough to expose this area, which has spawned countless jokes and even a few viral moments. "Butt crack of dawn" is a playful extension of the term used to describe an unreasonably early morning hour.
His jeans were so low that butt crack was basically part of his outfit at that point.
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(US, mildly, _, vulgar, slang) The gluteal cleft.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.