Essentially a 'burn' about a burn (e.g. sunburn) that was mentioned in a particular episode of the ever-popular That 70's Show (see burn).
Jackie: Gee, I wish there was someone to help me put sunscreen on my body (hints Hyde).
Hyde: Good idea because sunburn could quickly lead to skin peeling.
Kelso: Aww man. That's a burn about a burn. That's like a second-degree burn!
by lastray September 23, 2010
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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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