Top Definition
a lesbian girl who enjoys taking her vagina and knock it on other vaginaes.
Hey, does your sister have a boyfriend? No, she is dating woman, shes a flatknocker.
by Aasmund March 24, 2007
5 Words related to flatknocker

Free Daily Email

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

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×