the art of bending one over the knuckles (the things that hold the train togather) of a stopped train and screweing the shit out of them and finishing before the train takes off and kills you.
pam was looking good at work today so after work we went to the bar and ended up knuckle fucking.
A moose knuckle is the shape formed by prodtruding labia majora(pussy lips) and the clitoral hood (the hood). Moose knuckles are big and gnarly in nature.
fat camel toe, stage meat curtains, big whisker biscuit, extra large pink taco, a mighty beaver, flabbly labbia, etc....
When a loved one or significant other won't help a bro out and he's forced to knuckle his own junk. Said bro shoots baby batter into his own hand and allows it to dry. The following morning punches the unwillingly participant from the night before creating an eruption of cum dust shooting from his knuckles.
Liz wouldn't go down on mike, so he gave her a full-on knuckledusting the nextmorning.