Top definition
One theory to explain the occurrence of a hole in the crotch of a mans jeans. Over time the material is eroded by the constant friction of the swinging ball bag.
Person 1: 'Dude, your nuts are hanging out of that hole in your jeans'.....

Person 2: 'Yeah sorry man, ball bag friction theory'
by Yippikiai June 09, 2013
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