He's so dumb, he thinks a Mexican border pays rent,
Catches on like a wet match
You are so dumb, you planted a dogwood tree and expected a litter of puppies
You are so dumb, you need a cue card to say "Huh?"
You are so stupid that if I gave you a penny for your intelligence, I'd get change back
You are so dumb, you play solitaire...for cash
You are so dumb, you need instructions on how to use a rocking chair

