slimy in WordNet English dictionary

1. morally reprehensible
   "would do something as despicable as murder"; "ugly crimes"; "the vile development of slavery appalled them"; "a slimy little liar"
   despicable  ugly  vile  slimy  unworthy  worthless  wretched 
   
2. covered with or resembling slime
   "a slimy substance covered the rocks"
   slimed  slimy