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Metephor for having sex with a female that is very "loose". The extra vaginal space can be compared to swinging a cat by it's tail in a large room, such as a gymnasium.
Jim: "Yo, I heard you've been banging Samantha. She good in bed?"
Joe: "Dude, that chick's been around. Banging her is like swinging a cat in a gymnasium."
by thewakeupguy April 23, 2008
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