Top definition
when a woman's hormones grow out of control, and an extreme amount of hair grows on the knuckles as a result, which resembles a mustache.
Damn, that crazy bitch needs to trim her knuckstache.
by tutt mason July 23, 2009
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