FBF Share definition Flag Fbf is a day to celebrate fat girls. Only on fridays you can be respectful to fat girls Oi boys. Guess what day it is? FBF? Yessir fat bitch Friday FBF by Bombaclartlad September 3, 2021 0 0 Get merch Get the FBF mug. Buy Now — $32.95 See more merch