DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Gaby \Ga"by\, n. [Icel. gapi a rash, reckless man. Cf. Gafe.]
      A simpleton; a dunce; a lout. [Colloq.]
      [1913 Webster]