He has a one-bit brain with a parity error.
Donated her body to science... before she was finished using it.
He has bubbles in his think tank.
His attic's a little dusty.
He's always sharpening his sleeping skills.
He's sausage short of a barbecue.
He's a few planes short of an Air Force.
Why don't you go home and brush up on your ignorance?
I don't know what it is that makes you stupid but whatever it is it works.
Yes I do like your dress - but isn't it a little early for halloween.