fart shaker Share definition Flag A person who washing someone's underwear. Mostly used to describe men over 18 who still live at home in a parents house. Dude you need to grow up, your mom is still your fart shaker. fart shaker by "MADMAN" December 27, 2020 0 0 Get merch Get the fart shaker mug. Buy Now — $32.95 See more merch