Top Definition
an obese young person with a enthusiastic interest in contemporary alternative pop culture specifically music and fashion.
- look at that guy he seems pretty chill, almost like a hipster but fat

- yeah he's a fatster
by danne March 25, 2011

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A Harley Davidson Sportster motorcycle customized to resemble a Fat Boy model, usually with a wider front end, larger gas tank, and lower fenders. People create fatsters both because it is much less expensive than buying a Fat Boy and also because the Sportster models have much faster engines than the slower Fat Boys. Sportster models are often looked down upon as being "girl bikes" because they are often the less expensive models which men will buy for their wives, and this may play a role in the desire to change their appearance.
I couldn't believe that Bill bought a Sportster until he turned it into a Fatster.
by Nefariouslacker January 15, 2009

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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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