1 definition by gangster gay

Top Definition
The act of slapping your sexual partner in the face with your genitailia
guy 1:what did you do last night?
guy 2:oh, i gave lisa a good Wallywack.
guy 1:hell yeah man!
(this is the time where you initiate a high-five)
by gangster gay December 28, 2010

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