BFFR Share definition Flag stands for "Be Fucking For Real". Looks like the word BBF but is compleatly different. used when someone says someting unbelieveable, or shocking "your not dating Justin Beiber, Emma, BFFR." BFFR by yagurlem March 22, 2023 0 0 Get merch Get the BFFR mug. Buy Now — $32.95 See more merch