absurd, asinine, ass,
blank, crass, cully, daft, dumb, fatuous, fool, foolish, footling, frivolous, gay, gormless, inane, inconsiderate, inconsiderateness, inept, insane, insipid, mindless, muddle-headed, muddleheaded, mute, noodle, nuts, obtuse, pigheaded, senseless, silly, simpleton, sodden, sot, stupid, thoughtless, unguarded, unreasoning, unthinking, vacant, wacky, yokel, yoyo