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.
מאת Pipe Downn 10 באוקטובר, 2008
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!"
מאת Ragnarok7 8 באפריל, 2007
to backstab or go behind one back; synonyme to rat fuck
Nobody bat fucks me and gets away with it
מאת gryphon 14 בדצמבר, 2003
When you get fucked by a bat
John batfucked Sally. Therefore sally got fucked by a bat.
מאת George 28 במרץ, 2005

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