1 definition by CarlosJ76

Top Definition
The movement or motion during masturbation that get's the job done!
Every girl has a lip!bang theory, ya know, when they are fingerbanging themselves.
by CarlosJ76 March 29, 2011

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