Couldn't pour water out of a boot with instructions on the heel.
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Body by Fisher, brains by Mattel.
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As smart as bait.
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Chimneys clogged.
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An intellect rivaled only by garden tools.
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Doesnt have all his dogs on one leash.
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He fell out of the Stupid tree and hit every branch on the way down.
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Elevator doesnt go all th eway to the top floor.
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All foam, no beer.
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Forgot to pay her brain bill.