bonehead I. \ˈ ̷ ̷ˌ ̷ ̷\noun : a stupid or slow-thinking person : numskull, blockhead < you got boneheads running business nowaday — Ira Wolfert > < a bonehead play by the shortstop > • bone·headed\ˈ ̷ ̷| ̷ ̷ ̷ ̷\adjective II. \ˈ ̷ ̷ ˈ ̷ ̷ \adjective Etymology:bonehead, noun : being a college course intended for students lacking fundamental skills : remedial < teaches bonehead English >