1. superlative form of 'onery'; most inclined to be ornery, stubborn, or bad-tempered
Usage: informal; chiefly dialectal or colloquial

Examples

• That old mule is the oneriest animal on the farm.
• He was in his oneriest mood after losing the game.
• The oneriest customer complained about everything in the store.
• She became oneriest when she didn't get her way.
• Of all the kids, he was the oneriest troublemaker.