A Neanderthal brain in a Cro-Magnon body.
An experiment in Artificial Stupidity.
Been napping in front of the ion shield again.
Can be outwitted by a jar of Marshmallow Fluff.
Can't find his ass with two hands and a periscope/
Doesn't have the sense God gave an animal cracker.
Fired from McDonald's for having a short attention span.
Guillotining him would make only an aesthetic difference.
Has a full six-pack but lacks the plastic thing to hold them together.
Has all the brains God gave a duck's ass.
Has an IQ of 2, and it takes 3 to grunt.
He seems to be a bit wispy of the grey matter.
He's not stupid; he's possessed by a retarded ghost.
If he had half a brain, his ass would be lopsided.
IQ = dx / (1 + dx), where x = age.
Living proof that nature does not abhor a vacuum.
Not enough brains cells for the Prozac to be effective.
One of the early failures of electroshock therapy.
Proof that evolution *can* go in reverse.
So stupid, mind readers charge her half price.
ome drink from the fountain of knowledge, but he just gargled.
Suffers from Clue Deficit Disorder.
The wheel's spinning but the hamster's dead.
Wasn't abused as a child, but should have been.