FYDB 

Fuck you doin bro?

-Yo! FYDB?
-Drinkin a beer and waitin for you

FYDB by Biff Webster87 May 10, 2012

FYDB 

FUCK YOUR DADs BUTT

1) Oh you son of a bitch, FYDB!!!

2) FYMP??? FYDB!!!!

FYDB by PDX Lucha July 8, 2009

FYDB 

FYDB is an acronym meaning fuck you dumb bitch it can be used as a substitute for good bye

Yea

Person 1: bye

Person 2: FYDB

Person 1: what does that mean?

Person 2: bye in a different language

FYDB by Kholl May 13, 2020