Top Definition
When the muscles of the buttocks tighten up suddenly and unnecessarily, causing the feeling that the butt is under attack.
Often times this happens when you have to poop really bad.
John: Ah, butt attack!
Moses: You have to poop, man?
by purplecalculus June 26, 2011

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A vexing situation in life that is out of one's control. A negative turn in one's day.
Man, I can't believe I overdrew my damn checking account- talk about a massive buttattack.

A buttattack in the afternoon?!? Man I shouldn't have left my cellphone on the table.
by chicky22 April 07, 2009

The Urban Dictionary Mug

Lotsa space for your liquids.

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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.

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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