Muff Tumbling Share definition Flag When two women rub their vaginas together for sexual pleasure. A synonym for "Scissoring". "Dude, I went to this party the other day and there were these hotties muff tumbling in the living room. Shit was cash!" Muff Tumbling by Red0991 September 29, 2012 0 0 Get merch Get the Muff Tumbling mug. Buy Now — $32.95 See more merch