Dunderhead

Pro Tip 1/3

Informal Use

Best used among friends or in casual conversations, not in professional or formal settings.

After losing the game, Jim jokingly called himself a dunderhead.

Pro Tip 2/3

Humorous Insult

Often used humorously rather than to seriously insult someone.

You locked your keys in the car? You dunderhead!

Pro Tip 3/3

Mild Offense

It's a mild term of offense; not as harsh as other insults but can still hurt if not used jokingly.

Lisa smiled when her brother called her a dunderhead, knowing he didn't mean it.