DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   gaffe \gaffe\ (g[a^]f), n.
      A socially awkward or tactless act.
      Syn: faux-pas, solecism, slip, gaucherie.
           [WordNet 1.5]