Top definition
To fuck a chick with a big pussy. A normal sized pussy is called a camel toe. A pussy with large outer lips is called moose knuckles. Therefore, when you fuck a chick with moose knuckles, your balls slap her enormus lips. So your knuckle balling.
Dude, I hooked up with this hot chick last night but when the panties came off she had the biggest pussy lips I've ever seen. So, did you bolt? I thought about it, but I went knuckle balling instead.
by Bagmister September 28, 2006
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
T-shirt icon

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