Futon brother Share definition Flag When two buddies have fucked the same girl on the same futon at different times. John- "I fucked Sarah on the futon."Sam- "Really? So have I!"John- "You're my futon brother!" Futon brother by Grif192 September 28, 2013 0 0 Get merch Get the Futon brother mug. Buy Now — $32.95 See more merch
