A guy who is not in a fraternity (however has the potential of being in one) but has the character traits of a stereotypical frat boy. This includes drinking, partying, being a douche, and trying to get laid. Frat asses can also be fraternity boys who are only in the fraternity for those specific reasons.
Brian has turned into such a frat ass...he's not even in a fraternity!
by Uranus101 November 01, 2010
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A fun word to call fat assholes who gave their soul to a frat in hopes of friendship.
Me: "Raphael you're such a fratass!"
Raphael: "The Omega-mega-mega's accept me, who accepts you?"
Me: "Ur mom!"
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1.) A person, mainly of Fraternal origin, that has an aura of booze drinking, Holier than thou, and overall stupidity.

2.) A friend who drinks a lot and/or acts as above.
"Hey Simon, look at that Frat Ass."

"Dude, you are such a Frat Ass."
by Garfunkel64 April 11, 2010
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Member of a fraternity, whose frattitude is at its highest point.
A male with three or more of the following items is considered a "Fratass", Costa Del Mars, Frat tuck, Natural Light, Backwards hat, Flip Flops, Tahoe, and Croakies.
by Frankie Mcdangerous August 09, 2008
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A dumbass who thinks it's okay to do drugs, get STDs, and shoot (literally or metaphorically) other people in the face. He doesn't nesscessarily have to be in a fraternity, he just has to show stereotypical frat boy douche bag qualities.
21 Jump Street is funny and all, but let's face it. It's basically a frat ass' wet dream.
by A-person_yay June 21, 2014
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