The substance that accumulates in the crevice between the buttocks. Typically composed of sweat, dead skin cells, environmental soil, and trace amounts of feces, its production is often facilitated by rigorous activity or long intervals without bathing. Known to possess a rather unpleasant odor and foul taste.
Ass Butter: The cause of this occurrence is widely known among the over weight people that work in hot environments, as the body sweats the opening of the rectom sacreats a light yellow fluid with a pungent oder that has been recorded to smell from 6 feet away.
"Jason" fuck sake did u smell that fat cunt jump off that fork lift.
"Kevin" yea bro, he must be seriously turning up some ass butter inbatween thoes cheeks !!