Top Definition
A fat chick or a fatty posse. Derived from the fat girl sorority Omega Mu in the movie Revenge of the Nerds. The Omega Mu plumpers help the nerds such as Takashi, Wormser, Poindexter, Lewis and Gilbert, Lamar Latrell and Booger combat the jocks and cheerleaders and they put on a concert and take control of the campus.
"Look at that big fat fatty in the short skirt and tight, low cut top!"

"What an Omega Mu!"
by PMax February 12, 2008

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt