airhead

She's such an airhead, always forgetting her keys.

Don't be such an airhead, pay attention to what I'm saying.

He's a total airhead when it comes to directions.

I can't believe I was such an airhead to trust him.

She may seem like an airhead, but she's actually very intelligent.

Stop acting like an airhead and focus on the task at hand.

I can't stand working with airheads who don't take their job seriously.

Being an airhead won't get you far in life.

She's always been a bit of an airhead, but we love her anyway.

I felt like such an airhead after making that silly mistake.