Top Definition
A nickname for a long-distance motorcyclist. The Iron Butt designation often specifically applies to someone who has motorcycled 1000 miles in a 24-hour period.
"I earned my Iron Butt patch last July when I rode from Poughkeepsie to Jacksonville in last than 24 hours."
by Bill from VA February 13, 2012

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the stinky smell that comes outa a female dogs butthole! its nasty and smells like rustu iron
Peanut has iron butt again!
by trumpetcatz July 30, 2003

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.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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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