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
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.