butt crack
The American slang term for the gluteal cleft — the vertical groove between the buttocks.
Seen in the wild
I’m your shelter from the storm, you'll know I'll always have your back. I'll even let you warm your freezing hands inside my butt crack
So a friend noticed my Greyhound Hall of Fame hoodie has pawprints right at the butt crack area. An embroidered nose print would have been totally funny! 🤭
You know what? I hope everything single person responsible for that gets shingles in their butt crack.
Definitions
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.
Comments
(US, mildly, _, vulgar, slang) The gluteal cleft.
“So a friend noticed my Greyhound Hall of Fame hoodie has pawprints right at the butt crack area. An embroidered nose print would have been totally funny! 🤭”
“You know what? I hope everything single person responsible for that gets shingles in their butt crack.”
“I’m your shelter from the storm, you'll know I'll always have your back. I'll even let you warm your freezing hands inside my butt crack”
— Bluesky· May 2026“So a friend noticed my Greyhound Hall of Fame hoodie has pawprints right at the butt crack area. An embroidered nose print would have been totally funny! 🤭”
— Bluesky· May 2026“You know what? I hope everything single person responsible for that gets shingles in their butt crack.”
— Bluesky· May 2026
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Semantically related
- buttcrack90%
American informal slang for the gluteal cleft — the vertical crease between the two buttocks. It's a universal, deeply unsexy term that appears in complaints about low-rise jeans, plumbing jokes, and any situation where someone's backside is more visible than intended. Buttcrack is one of those words that exists primarily to make people groan or giggle, and it does its job faithfully every time.
- ass crack87%
North American vulgar slang for the gluteal cleft, the vertical groove between the buttocks. Used descriptively in anatomical conversation, fashion contexts involving low-rise clothing, or as a colorful time marker in the phrase ass-crack of dawn, meaning extremely early. That idiomatic usage — the ass-crack of dawn — is arguably the most commonly encountered form in contemporary speech. The compound is used across a broad range of formality levels — from medical professionals noting gluteal cleft positioning to friends ribbing each other about revealing waistlines.
- ass crack87%
North American vulgar slang for the gluteal cleft — the vertical groove between the buttocks. Used both in literal anatomical contexts (usually disparagingly, e.g. a tradesperson's exposed lower back) and in figurative expressions of very early time, as in 'ass crack of dawn'. That particular idiom intensifies 'crack of dawn' for comic effect, emphasising an ungodly hour. The term is blunt and informal, common in everyday American speech despite its vulgarity.
- buttcrack85%
(US, informal, slang) The gluteal cleft.