Source : Webster's Revised Unabridged Dictionary (1913)

Ill-bred \Ill"-bred`\, a.
   Badly educated or brought up; impolite; incivil; rude. See
   Note under {Ill}, adv.

Source : WordNet®

ill-bred
     adj : (of persons) lacking in refinement or grace [syn: {bounderish},
            {lowbred}, {rude}, {underbred}, {yokelish}]