ugly customer

72 Moby Thesaurus words for "ugly customer":
      Mafioso, Tartar, Young Turk, bear, beast, beldam, berserk,
      berserker, bomber, bruiser, brute, crank, crosspatch, demon, devil,
      dragon, feist, fiend, fire-eater, firebrand, fury, goon, gorilla,
      grizzly bear, grouch, gun, gunsel, hardnose, hatchet man,
      hell-raiser, hellcat, hellhound, hellion, holy terror, hood,
      hoodlum, hooligan, hothead, hotspur, incendiary, killer, mad dog,
      madcap, monster, mug, mugger, muscle man, plug-ugly, rapist,
      revolutionary, rodman, roughneck, savage, she-wolf, sorehead,
      spitfire, strong-arm man, termagant, terror, terrorist, tiger,
      tigress, torpedo, tough, tough guy, trigger man, violent, virago,
      vixen, wild beast, witch, wolf