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The act of masturbating in a group, such as in a circle jerk or in a game of limp biscuit.
When Timmy dropped his pants along with his friends for a round of circle jerk gangsturbation, they laughed out loud at how small his manliness was.

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Mark H. Proud Urban Dictionary Slang Author since February 2004.
by Mark H November 10, 2005
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2
A group of OG thugs jerking each other off.
The 5 o came in trying to bust a drug deal and they walked into the middle of gangsturbation.
by The Clitoris Crusher May 01, 2016
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