dull dumb foolish futile ill-advised irrelevant laughable ludicrous naive senseless shortsighted simple trivial dummy loser rash thick unintelligent brainless dazed deficient dense dim doltish dopey gullible half-baked half-witted idiotic imbecilic inane indiscreet insensate meaningless mindless moronic nonsensical obtuse out to lunch pointless puerile simpleminded slow sluggish stolid stupefied thick-headed unthinking witless