Guy Grey Share definition Flag Term describing the colour of once white laundry that has been repeatedly thrown into the wash with a mixture of dark and coloured clothing. Most often worn by males. "Dude, do you even own a white shirt?""Nah, they're all guy grey" Guy Grey by L0 March 14, 2010 0 0 Get merch Get the Guy Grey mug. Buy Now — $32.95 See more merch