2 definitions by Lovely_Lolita

Top Definition
The act of urinating into an anus.
I thought he was just into anal, but then he pistol starred me so hard I was buttpissing all night.

Get the turkey baster! Paul wants the girls to pistol star him again.
by Lovely_Lolita August 31, 2013

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1. Literally expelling urine from one's ass after having the urine injected into the anus during the act of a pistol star.
2. A specific type of diarrhea, wherein the contents of one's ass is expelled in a liquified, piss-like manner.
Paul was buttpissing all night after the girls all gave him a good pistol star.

Grant had to seriously buttpiss the morning after Joey gave him a pistol star for his birthday.
by Lovely_Lolita August 31, 2013

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