61-91 Share definition Flag when you are scratchin your ass and your finger slips and goes into your ass causing a major stink finger bro it stinks in here someone must have executed a 61-91 61-91 by P.I.M.P.123 December 18, 2004 0 0 Get merch Get the 61-91 mug. Buy Now — $32.95 See more merch