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When you grab your bare testicles where they are attached to the body and squeeze slightly to create what looks like a chicken brain with your nuts. Usually placed on the forehead of a friend who is passed out and pictures are taken.
Hey Bud, you were so fucked up last night that ZAC chicken brained you for like 5 minutes. I think he got ball sweat on your forehead too.
by Stephen June 03, 2005
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(verb) When you moon someone and you put your sweaty balls under your ass crack so the lookers can see them! something you will hope that you see only once.
We were driving to camp and Allen chicken brained us!
I hope that i never have to see that shit again!
by Vince! April 02, 2008
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