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A bro that sticks with you for years without breaking the Bro Code. You might eventually lose contact with a permabro, due to moving, etc., but your brolationship remains strong regardless.
Dude 1: Should you really be trusting Nick with your keg before tonight?

Dude 2: Don't worry man, he's a permabro; you could even trust this guy with your wallet and girlfriend.
by Brahfizzle April 30, 2012