on-ree
Coming from a latin background, to be onree is to be a smart ass, to disagree because you think its funny, or want to do something because you know it will be hard to do.
The real word is "ornery" though many people pronounce it "on-er-ee" or "on-ree". It means to be mischievious. It is often used to describe the actions of rambunctious children.
Billy has been throwing rocks at cars again. He's so onree.