1 definition by Lenny Rowan

ass butter

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.

I say, how old is this yogurt, mother? It tastes like ass butter.

by Lenny Rowan October 11, 2004