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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
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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2
When a person/persons hangs from the ceiling by their feet which then a male proceeds to put his penis in their mouth and continuously aggressively fucks her throat until he cums down her sore airways.
“Hey Nathan, I wanted to give my girlfriend bat brain last night but she was too heavy and she snapped the rope
by @kinggy May 09, 2020
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3
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
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