~Got into the gene pool when the lifeguard wasn't watching
~A few fries short of a Happy Meal
~An experiment in Artificial Stupidity
~A few beers short of six-pack
~Proof that evolution can go in reverse
~Doesn't have all his Cornflakes in one box
~The wheel's spinning, but the hamster's dead
~One Fruit Loop shy of a full bowl
~One taco short of a combination plate
~A few feathers short of a whole duck
~All foam, no beer
~Body by Fisher, brains by Mattel
~Has an I.Q. of 2, but it takes 3 to grunt
~Warning: Objects in mirror are dumber than they appear
~Couldn't pour water out of a boot with the instructions on the heel
~Too much yardage between the goalposts
~An intellect rivaled only by garden tools
~As smart as bait
~Doesn't have all his dogs on one leash
~Some drink from the fountain of knowledge, he only gargled
~Elevator doesn't go all the way to the top floor
~Forgot to pay his brain bill
~Her antenna doesn't pick up all the channels
~His belt doesn't go through all the loops
~If he had another brain, it would be lonely
~No grain in the silo
~Fell out of the family tree
~Receiver is off the hook
~Several nuts short of a full pouch
~He fell out of the stupid tree and hit every branch on the way down.
~Not the brightest crayon in the box
~Not the brightest color in the rainbow
~Not the sharpest knife in the drawer