F'karrff Share definition Flag Monosyllabic way of telling somebody to fuck off. Compulsory if you are named Craig Jenners and putting on a bad Irish accent. "Ahh, f'karrff!" F'karrff by KHD October 17, 2003 0 0 Get merch Get the F'karrff mug. Buy Now — $32.95 See more merch