Top definition
when you wack your sack against the wall of a vagina until it turns blue.
Dude why are you limping?

i gave my girlfriend one mean blue sack attack, and i still havent recovered.
by herbizzle November 05, 2007
Mug icon

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