1. A single slut (usually a girl) who goes around preying on unsuspecting males. Usually offensive.
2. A slut with boy/girlfriend who is a sex pest and basically cant get enough sex of any description. This might mean that they pull some shapes and spring a sex attack on their partner when they are least expecting it. Usually a compliment.
(I've heard it used to mean this third definition, but its not used as much as the above 2)
3. Someone who goes around spreading STD's whether they are aware of it or not. Hated by all. Disgusting dirty person. Ought to go to a GU clinic but is too busy having sex to get around to it. You do not want to be friends with the person as you will probably pick some diesease off them even breathing the same air as them.
2 - E.g. "I got sexually terrorised by Sarah last night. She's such a nympho, she keeps giving me head every couple of minutes when noones around! I love it!"
2. (n.) Someone who drops a "sex bomb" in public places, bringing joy to all the world.
Jessica: Maybe you should have kneaded his balls like the other tip?
Mark: I can't believe it man, she tried to hum with my balls in her mouth and did something horrid with my dick. She is a total sexual terrorist!