The slightly moist froth that builds up between a persons ass cheeks after prolonged physical activity on warm days. Ass Lather is usually accompanied by a foul stench. Similar to Swamp Balls.
Dude, I forgot to take a shower before I nailed Amanda in the turd cutter, now I have a serious case of Ass Lather!
by TheGhosthammer January 20, 2008
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