The wheel's spinning but the hampster's dead.
The butter has slipped off his pancake.
Body by Fisher, brains by Mattel.
He fell out of the stupid tree and hit every branch on the way down.
One fruit loop shy of a bowl.
Her antenna doesn't pick up all the channels.
His belt doesn't go through all the loops.
She's not the coldest beer in the fridge.
He's not the brightest crayon in the box.
Her slinky's kinked.
Got a full 6-pack, but lacks the plastic thingy to hold them together.
A photographic memory, but the lens cover is on.
Gates are down, lights are flashing, but the train isn't coming.
She stayed on the Tilt-A-Whirl a bit too long.