whip-smart Antonyms

bovine obtuse simple-minded slow slow-witted thick vacuous witless wooden barmy kooky empty-headed dopey boneheaded thickheaded wooden-headed moronic mindless imbecile brainless chuckleheaded crazy cretinous daft dense dim doltish dozy dull dull-witted dumb foolish half-witted idiotic ignorant unintelligent