Uncouth

Meaning:  Lacking good manners, refinement, or grace (of a person or their appearance or behavior).

Synonyms: Uncivilized, uncultured, uncultivated, unrefined, unpolished, unsophisticated, bush-league, plebeian, common, rough-hewn, coarse, loutish, boorish, oafish, troglodyte.

In Hindi: असभ्य, गँवार

Use: While George comes from a very wealthy family, he often behaves in an uncouth manner and acts as though he has no social skills at all.

My brother’s uncouth girlfriend does not realize she should close her mouth while chewing her food.