2 definitions by Inaj Jane D.
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