When a man takes his nut sack gym bag and places it as close to the face of a sleeping victim as possible. A picture is then taken with the balls/victim in the same photo.
Chris fell asleep, so I brained him.

Braining is fun, but my nuts get camera shy.
by Amber June 1, 2004
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When u grab your sack and squeeze forcing your balls to go tight against the skin, causeing THE BRAIN!!!
Dan-THE BRAIN!!!
Steve-AHHH WTF DAN
by J-dawg January 1, 2005
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Verb. To be hit really hard in the head.
I got seriously brained against a brick wall and I still can't see straight.
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Another word for head, or blowjob. This term is most appropriate however, because unfortuantley, most male brains reside in their penile regions
"That girl has a foot long tongue, I bet she gives great brain!"
by Rae Rae March 23, 2005
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Something that Justin Bieber fans don't have.
Susan: I have such a huge crush on JB!

Bill: I always knew you had no brain!
by Sum Gy April 3, 2012
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To strike a person in, on or upside the head deliberately and violently oftentimes with a blunt object.
Nick told Jerry, "Pay me what you owe me or I swear I'll brain you with this crowbar".
by Nikki Stixx December 10, 2018
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