dolt

The boy is a dolt, but we’ll hammer these facts into his dull wits.

He's such a dolt that he can't even tie his own shoelaces.

Don't be a dolt and remember to bring your ID to the concert.

She felt like a dolt after forgetting her friend's birthday.

The dolt spilled coffee all over his laptop.

Only a dolt would believe such an obvious lie.

He's a dolt when it comes to understanding technology.

She felt like a dolt for not studying before the exam.

The dolt forgot to set his alarm and missed his flight.

His doltish behavior at the party embarrassed everyone.

She called him a dolt for not following simple instructions.