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 09, 2005
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