by YAYA_Please June 23, 2011

when a man exposes his testacles and spreads his skin it appears to look like a brain with bat wings.
FROM THE MOVIE "WAITING"
jerico: dude, have you ever seen a bat brain?
mark: what's a bat wing?!?
(jerico pulls down pants)
mark: eeeeeeew!
jerico: dude, have you ever seen a bat brain?
mark: what's a bat wing?!?
(jerico pulls down pants)
mark: eeeeeeew!
by Inaj Jane D. March 16, 2008

When a male takes his excess skin on his testicles and streches out to look like or resemble a bat wing.
by Henri June 17, 2006

(n) A humiliating yet humorous gesture performed by stretching the skin of the testes in opposite directions to resemble the wings of a bat
by kaiiiiiii December 1, 2009

by Donnie April 8, 2005

A vagina that is loose and saggy with little black hair sticking out of it that if looks like a pair of bat wings.
Tyler: Hey look it's Abby.
Austin: She's gross, i got a forward of her yesterday, she has bat wings dude.
Tyler: Rofl
Austin: She's gross, i got a forward of her yesterday, she has bat wings dude.
Tyler: Rofl
by assasin801 March 10, 2010

when you preform oral sex on a girl when she is on her period and you get the blood all over your face usually in the shape of bat wings
by hhhchick June 21, 2011
