Whilst in an arguement, to avoid the point (thus a cop-out) and to insult the person arguing. Often because the person who results to the insults has no logical/intelligent point, thus they break down to immaturity.
Jon: I've made my point five times and all you've done is call me 'gay', way to resort to ad hominem, dude.
by Mike April 26, 2005

Abbriviation for "What A Fag"
by Mike June 10, 2003

an album. a cd. a vinyl record.
by Mike July 19, 2006

A girl who is not exactly fat and not exactly skinny, but definitely attractive. Think "curvy." If she gained weight, she would be "fat," but she isn't yet. She's right on the border. Sex with her will widen (pun intended) one's tolerance range for weight, making heavier girls seem attractive as well. Eventually, the guy who sleeps with the gateway fatty becomes a full-on chubby chaser.
Rick: Dude, Amanda's hot.
Steve: Stay away from her! She's a gateway fatty!
Rick: But she's hot!
Steve: Yes, she is! And if you sleep with her, next thing you know you'll be sleeping with girls twice her size!
Steve: Stay away from her! She's a gateway fatty!
Rick: But she's hot!
Steve: Yes, she is! And if you sleep with her, next thing you know you'll be sleeping with girls twice her size!
by Mike March 19, 2008

by Mike March 21, 2005
