Tending to make poor decisions or careless mistakes, Very dull; insensible; senseless; wanting in understanding; heavy; sluggish; in a state of stupor; -- said of persons, Lacking in intelligence or exhibiting the quality of having been done by someone lacking in intelligence, adverb_ slang, dated Extremely, noun_ a person who is not very bright, A stupid person; a fool, A stupid or humdrum person; a blockhead; a dunce