cocky

the boy is cocky and obstreperous.

he was brash, cocky, and arrogant.

be cocky (at success)

It’s rather difficult for a cocky person to be on good terms with others.

He's always so cocky after winning a game.

Her cocky attitude can be off-putting to some people.

Don't be so cocky, you still have a lot to learn.

His cocky remarks often rub people the wrong way.

The cocky new intern thinks he knows everything already.

She's too cocky for her own good.

His cocky behavior cost him the promotion.

Being cocky is a sure way to alienate people.

The team captain's cocky demeanor can be intimidating.

She needs to tone down her cocky attitude if she wants to make friends.