The Collaborative International Dictionary of English v.0.48:

Ill-bred \Ill"-bred`\, a.
   Badly educated or brought up; impolite; incivil; rude. See
   Note under Ill, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ill-bred
    adj 1: (of persons) lacking in refinement or grace [syn: ill-
           bred, bounderish, lowbred, rude, underbred,
           yokelish]