by Mini-Moose August 25, 2008

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

It's a fatso and very very ugly to the point where no guys would like it. It sucks at everything it does and calls itself smart even though it cheats off people.
It's a fatty
by fattymcfatfatty March 31, 2009

by Daniel February 2, 2004

by meloveyoulongtimeitstrue November 8, 2010

The act of firmly grabbing a roll of fat from someone's waist and shaking it like jello. Works best when applied to a muffin top.
Yo, check out the epic muffin top on that girl. I'm gonna sneak behind her and give her a fatty jiggle.
by Tres equis September 30, 2011

-(n)the art of an overweight person giving oral sex by putting the male sex organ in their fat roles and massaging it as one would do when giving a hand job.
by Mason Curran January 13, 2011
