Luke Bryan: JK ... Blake Shelton's a 'Terrible Person!!!'

Luke Bryan hit up the same Bev Hills restaurant Sunday night where Blake Shelton threw shade the night before ... clowning our photog by saying, "Blake's a terrible person."

Luke and his wife, Caroline, were leaving Mastro's when we asked about Blake's comment that he'd like to sit next to Luke at the Grammys but he's never nominated.

As we said, maybe not nominated but 14 #1s cushions the blow.

BTW ... Luke was there celebrating Valentine's Day.