knucklehead

don't be such a knucklehead and forget your keys again.

he called me a knucklehead for missing the meeting.

stop acting like a knucklehead and pay attention to the road.

sometimes i feel like a knucklehead for making silly mistakes.

my brother is a total knucklehead when it comes to math.

don't be a knucklehead; just follow the instructions.

she laughed and called him a knucklehead for his joke.

being a knucklehead sometimes can lead to funny situations.

he always acts like a knucklehead when he's nervous.

my friend is a knucklehead, but i love him anyway.