BFFTROMFL Share definition Flag Best Friend for the Rest of My Fucking Life. (biff-TROM-full) Hayley: I like being friends with you. Jenna: Fuck that, you're my BFFTROMFL. Hayley: That's so sweet of you! BFFTROMFL by snimmy August 5, 2011 0 0 Get merch Get the BFFTROMFL mug. Buy Now — $32.95 See more merch