He's one sentence short of a paragraph.
He's a few eggs short of a dozen.
Trying to make other people feel stupid doesn't make you seem smarter.
You should come with a warning label.
Your inferiority complex is fully justified.
He's so boring, he can't even entertain a doubt.
The next time I need an unsolicited and uninformed
opinion, I'll ask you.
It must be nice to be free of the burden of intelligence.
You may have nothing to say, but you say it so loudly.
I don't know what your problem is, but I'll bet it's hard to pronounce.
Please excuse him. He's currently going through a nonentity crisis.
People clap when they see you - they clap
their hands over their eyes.