Melvin

What you call someone that can't think for themselves and only cares about his own self. They often hit people for their own amusement and hurt other people, and apparently it's okay to do so if they're a Melvin. They're a bitch most of the time and whenever you stumble upon them you get the urge to beat the shit out of them, but it really isn't their fault since it's their personality to be a Melvin. They sound like a drunk cow trying to talk.

You're such a melvin
fuck you melvin, go die