fuckskid Share definition Flag a wet part in your sheets that are gross when you get up to pee after sex, or the crotch in your underwear the next day, when you go to work. i sneezed after that fuck, i now have a fuckskid in my undies! (after sex!) fuckskid by shannnanw September 3, 2009 0 0 Get merch Get the fuckskid mug. Buy Now — $32.95 See more merch