A Green Hat is that guy that sucks it up and takes the asshole in the event of a foursome that involves three guys and a girl.
Hey, Green Hat, Take the backside for me!
by Jim35 November 04, 2010
C'mon, we're going streaking. Bring your green hat.
A hat that is green.
by kkatz March 12, 2004
green hat is a term used to refer to a computer hacker that is either

a.) willing to do anything for cash, or
b.) completely new to hacking and therefore "green"
one day i hope to stop being a noob green hat hacker and become a greedy green hat hacker.
by seerokool August 26, 2014

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