Top definition
When you pull ur nut-sack out of ur pants/shorts while keeping ur dick in ur pants, thus makeing them look like a monkeys brain
"Hey billy, wanna see some monkey brains?" "sure why not"..........."EEEEWWWWWWW THATS UR BALLS!"
by Rob Echlin July 22, 2004
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2
When you begin reading a page, and blank out thinking about other things. You finally come to, realizing that you read the whole page without ingesting a single word.
She was reading statistics homework when she suffered an acute case of monkey brain. I suppose thats what happens when you do your homework tipsy on the stairs in front of your building at 2:30 AM.
by the girl on the stairs. September 03, 2009
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3
Grab the scrotum sac and squeeze it from the base tightening the skin around the testicles. The result is a perfectly formed miniature "brain".
Dude, her stone cold heart turned to hot lava once she seen the monkey brain.
by Bret Austin September 10, 2004
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4
the look your nuttsacks make when you squash them between your legs
Hey check out my monkeybrains!
by mooseknuckles November 11, 2002
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5
Alternate name for Chocolate-covered cherry cordials. So named due to the white goopy fluid residing between the choolate shell and the cherry. As you take a bite, the chocolate looks like a monkey's skull, the goop resembles brain matter and the cherry appears to be a gigantic brain aneurysm.
Hot damn, Grandma gave me another box of monkey brains for Christmas!
by BeerLovinGuy February 13, 2004
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6
by Ishtar Garanga March 27, 2003
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7
1) The act of showing ones testicles to someone for amusement not sexual gratitude

2) When you squueze your foreskin tightly knotting up your balls
Im gonna Monkeybrain your sister while shes sleeping
by michael lowe May 09, 2007
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