1 definition by Paul, Andrew, Drew, John, Fabi,

Top Definition
The act of secret masturbation. Never done for voyeurism or sport. Usually done in the comfort of your dorm room on your friends desk when you think they are in class.
When you walk in on your roommate and he is crouched over, he is definitely scissor fisting!!
by Paul, Andrew, Drew, John, Fabi, September 04, 2007

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