overconfident

Maybe they're rude, overconfident or have a habit of helping themselves to snacks without asking.

It also measures uncertainty in its predictions, helping prevent overconfident but incorrect conclusions.

Mike was cocky and overconfident and Jordan was just concerned with Megan’s happiness.

An apparent similarity between two unrelated events, a parchment-paper test, makes us partial to seemingly endless, overconfident prophesies of disaster.

That "manifested as being quite contrary and overconfident in how everyone else should be living... and how I needed to be", she says.