Coined by Washington DC's DC101's morning Jock, Elliot Seigel, Stupid Fat is a nickname for Brian "Flounder" Schlossburg. He is known for Making his former girlfriend cry on the air. As well as his Saturday night event, Flounder's Mashups, and his Fat Man Run. Smell my face
Elliot - "Hey Stupid Fat! Get over here and Smell my Face!"
by john j. finnerty January 28, 2006
Someone is fat for no apparent reason. Due to overeating and lack of exercise because one is just "too damn lazy" to do something about their obvious weight problem.
Aeriel Griffin is stupid-fat because she sits around and eats. The only form of exercise she gets is sex with her smaller than average boyfriend.
by Kagan Phillip April 17, 2010