knucklehead (noun)

1. In the cartoon, the main character is always portrayed as a clumsy knucklehead.

2. Why did the knucklehead bring a ladder to the bar? Because he heard the drinks were on the house!

3. The novel featured a knucklehead character who constantly made foolish decisions.

4. The anime series showcased a group of knuckleheads who embarked on hilarious misadventures together.