Top Definition
The burning sensation in one's anus when defecating after eating something spicy.

i.e. It burns once going in and again coming out.

Afterburn
1: The habanero burned my mouth pretty badly, but the second burn was even worse!
2: Oh man, the second burn from that salsa had me on the toilet for hours!
by Emzi Mazem February 19, 2014
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