Top definition
A faggot's cock. It is continually going in and out compressing shit until it finally fires
Grass doesnt grow on a busy street. That poof has a bald arse because he is constantly being thrashed by a shit piston
by LuciferDarklord January 28, 2008
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Aug 4 Word of the Day
Man's greatest invention, brain bleach removes bad memories and general DO NOT WANT moments. Every household should have a few gallons.
1: Dude, I just walked in on my parents.
2: Have some Brain Bleach!
by Andikun November 06, 2007
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2
When your going anal with a bitch and she shits while your dicks in her ass forcing it back out like a piston.
I was with my hoe last night and while we were doing it she pulled a shit-piston.
by Donkeykong2128 May 31, 2015
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