1. Any weird old man that has, is, or will stalk/stare at/rape a woman/man/child that they don't know. Creepers are also known to break into peoples' homes and watch them sleep for hours at a time.
2. An annoying, explosive, green, penis-shaped enemy from the game "Minecraft"
Tammy: They 'Becca, do you see that guy standing out there at that bus stop?
Rebecca: Yes, why?
Tammy: He's been staring at us for an hour.
Rebecca: He must be a total creeper!
Tammy: Let's go walk into that dark, dead end alley way that no one will follow us into.
Creeper: *follows girls into the alley*
Minecraft Guy: Wow, it took me DAYS, but I've finally finished making my super awesome castle that nothing will happen to!
Creeper: *walks up silently behind Minecraft Guy*
Minecraft Guy: *turns around*
Creeper: That's a nice EVERYTHING you have there. It would be a SHAME if something were to happen to it.
Minecraft Guy: NOOOO!!
Creeper: SSSSSS- *explodes, demolishing the castle*