slit willy Share definition Flag When you give a chick a wet willy with her pussy juice i was fingering Janice, and I gave her a Slit Willy, and she swatted my finger out of her ear. slit willy by Bess Money, Spang Deez, Mad Dawg Hoof August 13, 2006 0 0 Get merch Get the slit willy mug. Buy Now — $32.95 See more merch