f*ck buddy Share definition Flag a fuck buddy is a friend that u have sex with, NO STRINGS ATTACHED "im so horny" "me 2. hey, wanna b my f*ck buddy?" "wouldnt that b a bit weird?" "nah its just sex" f*ck buddy by Sharacaroline May 14, 2007 0 0 Get merch Get the f*ck buddy mug. Buy Now — $32.95 See more merch