Top Definition
Totally insane; insane enough to fuck a bat.

May be used adverbially as an intensifier (e.g. "batfuck crazy") or on its own as an adjective.
You little sister is completely batfuck crazy. She was trying to smoke a coathanger.

Yea, she's totally batfuck man.
作者 Pipe Downn 2008年10月10日

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n. a social event or dance to which the gentlemen involved invite the ugliest skanks that can be found in time for the occasion. A prize is usually awarded to the guy who brings the broad judged worst.
"Hey John. What say we organize a batfuck for Saturday night next."

"Kewl man! We haven't had one of those since last spring, and I know just the perfect hog. Yowsa!"
作者 Ragnarok7 2007年4月08日

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to backstab or go behind one back; synonyme to rat fuck
Nobody bat fucks me and gets away with it
作者 gryphon 2003年12月14日

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When you get fucked by a bat
John batfucked Sally. Therefore sally got fucked by a bat.
作者 George 2005年3月28日

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