Grumpy Cow Share definition Flag verb The act of waiting until your wife, girlfriend or friend with benefits is asleep, then tipping her over so you can get some booty. I treated my wife to a grumpy cow last night. Grumpy Cow by westwardHo April 28, 2019 0 0 Get merch Get the Grumpy Cow mug. Buy Now — $32.95 See more merch