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1. Power Fisting
The act of repeatedly inserting and retracting a clenched fist at Bruce Lee speeds.

Usually into a bodily oraphis with out lube. If executed correctly uncontrollable bleeding will occur.
"I just got arrested for power fisting my girl friend, she got taken to ER"
2. power fisting
Beating someone or something senseless with a mechanical fist.
Oh man, I just got done power fisting, I'm exhausted. I think I'll go take a nap.
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