ugly and unpleasant in disposition or temper

No one can get along with my ornery cousin.

stubborn

I can't do a thing with that ornery mule.

low or vile.

inferior or common; ordinary.

adjective

cantankerous , contemptible , crabby , cranky , crusty * , difficult , disagreeable , grouchy * , grumpy * , hard-nosed , ignoble , ill-tempered , irritable , nasty , obstinate , quarrelsome , rotten , sour , surly , testy , unfriendly , vicious , balky , contrarious , froward , impossible , perverse , wayward , crotchety , grouchy , mean