grumpy grizzly Share definition Flag when a man deficates in a womans hair then proceeds to rub it all overr her head with his dick. when my man grumpy grizzlys me i have to wash my hair our with peroxide for a week. grumpy grizzly by mcnealeven March 25, 2011 0 0 Get merch Get the grumpy grizzly mug. Buy Now — $32.95 See more merch