It Ain't Hemingway

You can look in one ear and see out of the other!

You aint got the brains GOD gave a rock

When they passed out brains, you thought they said rain and ran and hid.

They are dumber than dirt

Sharp as a marble!I

If you put her brains in a thimble they’d rattle like road apples in a bushel basket.

If his brains was axle grease he wouldn’t have enough to grease the dynamo on a lightening bugs ass.

If brains were gasoline, he wouldn’t have enough to run a piss ant’s go-kart around the inside of a donut!

Dumber than a well rope

Dumber than a bag of hammers.

Brick short of a load.