A guy that when using a
urnal, gets so close to it, he practically looks like he is
humping it. Usually someone who is insecure about
penis size, shape, etc., so they feel the need to avoid all chances of anyone else seeing. Common in boys ages 8-16
While walking out of
the locker room:
Guy: Did you see Ethan back there?
Guy 2: yeah, he's such a
urnal humper! I thought he was going pee all over himself
Guy: probably just has
a small dick