1 definition by Stupid Motherfucker

Top Definition
A muscle used to thrust the shaft of the penis into the vagina.
'Mommy, how come when you and dad make a lot of noise in your room, after there are always imprints on the ground?'

'Oh sweetie, its because of his pelvic muscles...and the fact that i weigh 300 pounds.'
by Stupid Motherfucker July 13, 2005

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