Dictionary:

boorish

  (bʊr'ĭsh)

Resembling or characteristic of a boor; rude and clumsy in behavior.

adjective

Lacking in delicacy or refinement: barbarian, barbaric, churlish, coarse, crass, crude, gross, ill-bred, indelicate, philistine, rough, rude, tasteless, uncivilized, uncouth, uncultivated, uncultured, unpolished, unrefined, vulgar. See courtesy/discourtesy, smooth/rough.

Definition: crude, awkward
Antonyms: charming, cultured, exciting, polite, refined, sophisticated

The adjective has one meaning:

Meaning #1: ill-mannered and coarse and contemptible in behavior or appearance
  Synonyms: loutish, neanderthal, neandertal, oafish, swinish