A fork of Rural Dictionary
The dark har on some female's upper lip.
Female + moustache = femstache
Did you see that woman? Her femstache was so hairy it looked like there was a fuzzy caterpillar on her upper lip!
A female mustache- you know it's there and try to keep it waxed. On sunny days it can be witnessed in the suns light. On day's like this it is best to hang out in the shade.
Some ladies have the femstache and will not do anything about it, you often feel compelled to grab a pair of tweezers and pull.
She was fully aware of her femstache( kicking herself for not waxing the night before.) but the office douche had to point it out anyway.