Top definition
Stands for Fit But Knows It

A person (usually a girl) who is hot but milks it.
1: Hey look at that, shes hot as fuck
2 True Dat, but shes an FBKI mate look how shes dancing with that guy
by juliusseizure99 April 08, 2009
Get the FBKI neck gaiter and mug.
Apr 28 Word of the Day
Literally everyone, ever. Including the writer of this definition.
by masokitsune January 17, 2019
Get a stupid people mug for your cat Paul.