looker n. + Add to list US //ˈɫʊkɝ// UK //lˈʊkɐ// look·er Slang SynonymsEtymology Synonyms beautyknockoutravishersmasherspectatorstunnersweetheartviewerwatcherwitnessOrigin From look + -er. Idioms2 entries01bad lookerSomeone who is unattractive or not pleasing to the eye.02good lookerA physically attractive individual, animal, or object.