Willy wankus Share definition Flag A general term to describe a mans Trouser snake, used by middle schoolers to refer to the male genitalia and not get caught(Will-EE-WANE-CUS) Person 1: my Willy wankus is pretty bigPerson 2: I bet it isn’t Willy wankus by Bigdumb532 May 20, 2024 Get the Willy wankus mug.