Top Definition
the act of masturbating while shitting, not to be confused with smashterbation, its much less strange homonym.
I found my self smashturbating the other day and proceeded to think, "Wow, smashturbation. How important is efficiency, really?"
by yoodooright April 14, 2008

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jacking off so hard that your dick bleeds.
mike thought smashturbation was fun.
by the secret stoner October 08, 2011

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