Stupid

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