DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   ruiner
       n 1: a person who destroys or ruins or lays waste to; "a
            destroyer of the environment"; "jealousy was his undoer";
            "uprooters of gravestones" [syn: destroyer, ruiner,
            undoer, waster, uprooter]