Top Definition
A person who does weird things, like stares at you while you sleep, follows you through the club, constant DM's, IM's and likes pictures from 3 years ago, or looks at you for hours through a window. Usually a close friend or relative. you know right away if that person is a Creepy Dude or does Creepy things. it is not hard to spot the Creepy Dude.

Also see Creeper, and Charlie Wilson a/k/a Creepy Uncle Charlie
While I was taking a selfie "Creepy Dude" in the background counting my neck hairs.
by mynduse September 02, 2014

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