1. Morally repugnant or distasteful; causing disgust or strong disapproval
   "he made a unsavory joke about the tragedy";
   - unsavoury [Brit, Cdn], offensive, sick, sickening, nauseating, loathsome
    
2. Not pleasing in odor or taste
   "The unsavory smell coming from the garbage";
   - distasteful, unsavoury [Brit, Cdn]

See also: abhorrent, absonant [archaic], despicable, detestable, disgustful [archaic], disgusting, foul, gross-out [informal], loathful [archaic], loathly [literary], loathsome, nauseating, obscene, repellant, repellent, repugnant, repulsive, revolting, sickening, slimy, ugly, unpalatable, unworthy, vile, wicked, worthless, wretched, yucky [informal], yukky [informal]