1) Abrupt 2) Brusk 3) Brusque 4) Caddish 5) Casual 6) Cavalier 7) Cool 8) Curt 9) Disrespectful 10) Impolite 11) Lacking social graces 12) Not courteous 13) Rude 14) Short 15) Showing bad manners 16) Showing no courtesy 17) Unceremonious 18) Unchivalrous 19) Uncivil 20) Ungallant 1) Abusive 2) Brusk 3) Brusque 4) Caddish 5) Cool 6) Curt 7) Disrespectful 8) Gruff 9) Ill-mannered 10) Impolite 11) Irate 12) Rude 13) Unchivalrous 14) Uncivil 15) Uncourteous 16) Ungallant 17) Ungracious 18) Unhandsome 19) Unmannerly 
• (a.) Uncivil; rude; wanting in courtesy or good manners; uncourteous.
Dis·cour'te·ous adjective [ Prefix dis- + courteous : confer Old French discortois .] Uncivil; rude; wanting in courtesy or good manners; uncourteous. -- Dis*cour'te*ous*ly , adverb -- Dis*cour'te*ous*ness , noun
[adj] - lacking social graces 2. [adj] - showing no courtesy
ungracious adjective lacking social graces
not courteous; impolite; uncivil; rude: a discourteous salesman.
showing no courtesy; rude