WordWeb Online

1. A person who is deemed to be despicable or contemptible
   "only a rotter would do that";
   - dirty dog, rat, skunk, stinker, stinkpot, bum [N. Amer], crumb, lowlife, scumbag, so-and-so, git [Brit], sleazeball, slimebag, scuzzbag [N. Amer], scuzzbucket [N. Amer], ratbag [Brit], sleazebag, scuzz [N. Amer], toad, scuzzball [N. Amer], dirtbag [US], slimeball

Derived forms: rotters

Type of: disagreeable person, unpleasant person

Encyclopedia: Rotter