tumble Share definition Flag 1.The bear named tumble who follows us around in his airspeeder. 2.Something the bear named tumble does. 3.A tumble roll. At that, tumble the bear did a tumble roll tumble by Cpt. NMV June 7, 2003 0 0 Get merch Get the tumble mug. Buy Now — $32.95 See more merch