Top Definition
a move personally made up from the batwing, a cruel joke, mostly done by other teenagers, where you take your scrotum, spread half of your sac out with your hand, and cup the other nut in your hand like a brain. takes a while to get right, but when accomplished, is better than the batwing
I flashed robert with the bat brain, and he threw up!

Adam scared a kid with the bat brain.

by bodhi williams March 25, 2008
1 more definition
7 Words related to bat brain
A Batman fan who always has Batman on the brain.
Ever since Tim saw his first Batman movie, he's been a total batbrain.
Mr.Person A:Yesterday I saw some nerd running around in a Batman suit.
Mr.Person B:What a batbrain.
by Wilddwarf June 27, 2009

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.