Top Definition
The shit stain left on the toilet seat from some fat ass that can't wipe his butt and leaves a mark on the seat for the next guy. Ass lipstick is like the lipstick left on a coffee mug or cigarette butt, except it is on the toilet seat and it is from your ass.
I went for a shit and saw someone left me ass lipstick stain on the toilet seat for me to enjoy.
by thank you 2 January 06, 2010
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