blackguard
     n : someone who is morally reprehensible; "you dirty dog" [syn:
         {cad}, {bounder}, {dog}, {hound}, {heel}]
     v 1: subject to laughter or ridicule; "The satirists ridiculed
          the plans for a new opera house"; "The students poked
          fun at the inexperienced teacher"; "His former students
          roasted the professor at his 60th birthday" [syn: {ridicule},
           {roast}, {guy}, {laugh at}, {jest at}, {rib}, {make fun},
           {poke fun}]
     2: use foul or abusive language towards; "The actress abused
        the policeman who gave her a parking ticket"; "The angry
        mother shouted at the teacher" [syn: {abuse}, {clapperclaw},
         {shout}]
Source: WordNet® 2.0