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1 definition by Jeff Houser

 
1.
The act of pulling one's scrotum (testicles included) through the opening in one's pants or shorts, thus exposing the beauty of one's gonads for all to admire. Named for the remarkable resemblance of the display to a human brain, hanging in the breeze.
Dude was hanging brain at The Coney for almost an hour before he got busted by some chick drinking Yeungling.
by Jeff Houser November 05, 2003