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It's a snuggie or a slanket with a hole cut out for the penis. Th wearer can cover everything but their cock.
I'm going to get in my Cockoon and cover my face for some instant/portable glory hole action.
by Goatoad January 28, 2010
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noun. When a man forgoes washing his genital region. The hair coats to the penis, this creating a "cockoon." It it said to resemble an "owl pellet."

Perhaps one day a butterfly.
Tanner Smith doesn't shower. Therefore, he has a cockoon.
by Jaeger Wells May 12, 2009
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