When you squeeze your nut sack and your testicles come up together and they look like a brain
by That Asian Bat Wing May 20, 2014
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When your scrotum is tight and together, forming a "brain"- like figure.
Its cold out here", "Tell me about it, I have had brain balls since i walked out here
by TehBud April 17, 2011
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I'm just brain balling here but I think it's a good idea.
by unizebra September 10, 2020
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Can mean to be concentrating or thinking, and in some cases rubbing your testicles to be able to relax and to think.
Dude, that quiz is gonna be rough... I'm gonna juggle the brain balls to get ready.
by mrsman January 15, 2007
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Something you either need massive balls to do or zero brains.
Example with no brains

Bobby “Why is that guy riding a motorcycle with no helmet at 130 mile per hour (209 Kilometers per hour)?”
Brandon “That’s because he has a bad case of Balls No Brains

Example with huge balls

Bobby “damn! That guy just punched one of the robbers in the face, too bad he’s about to get shot.”
Brandon “That guys got a serious Balls No Brains way of thinking.”
by Closet Gayng October 21, 2021
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