A highly creepy guy. Usually bearing the name Benjamin. A Creepy McCreepster will often be found pretending to be a ninja and creeping.
Girl 1: I got a dirty Facebook message today.
Girl 2: Oh yeah? Who was it from?
Girl 1: Ben.
Girl 2: Creepy McCreepster strikes again.
a derogeratory term for a teenage boy who likes to creep on girls, for example by knowing their bra size or referring to inappropriate parts of a female body in a creepy manner.
girl 1- ew he wont stop talking about an 'uberhole'
girl 2- ew! he's such a creepy mccreepster!