rougher
Someone who is very aggressive in doing something (fighting, making love, etc.). They will typically do it in a joking or "just kidding" manner but won't do it lightly.
Person 1: I went out with Karla last night.
Person 2: What happened?
Person 1: Dude, we were making out when she bites my ear really fuckin' hard.
Person 2: She sounds like a total rougher, man.