BFICM Share definition Flag Bat Fuck Insane Cotton Mouth -The worst kind of cotton mouth to have. "Dude... BFICM" -"Bu fick emmm? WTF man?" "No dude BFICM" -"Dude you're retarded" BFICM by TehUberGethKill3r July 6, 2008 0 0 Get merch