airhead in English:

When are you going to stop laughing like an idiot?

I'm told "idiot" is a bad word, but where I grew up it doesn't really feel that bad.

You are, hands down, the biggest idiot I've ever met.

Thanks for having explained to me at last why people take me for an idiot.

Idiot!

Idiot, "moron," and "imbecile" were all once scientific terms referring to specific IQ ranges.

Yes, in Osaka too we say "idiot" when we are insulting someone.

Why is it every goddamn Smashing Pumpkins video I go to, some idiot compares them to Nirvana? What the fuck?

You know what my idiot son's doing? Even now he's graduated from university he spends all his time playing pachinko instead of getting a job.

Ah, this is my idiot son Takashi "Eh-er, yes. (The late) Takashi, right?" "Fuusy, he isn't dead yet! Probably."

I will not be dictated to by some idiot in the personnel department.

Idiot! She's not being honest when she says she loves you. Haven't you figured it out yet? She's just a gold digger.

One idiot can ask more questions than ten wise men can answer.

Idiot, I've forgotten that two-timing bitch.

He felt like an idiot because in Russia if you smile all the time, people think that you are mad.