know stuff

accomplished adroit capable deft proficient skilled skillful versed

ace clean crack crackerjack expert hotshot quick savvy sharp slick smooth there whiz wizard

brainy dexterous hot masterful masterly no dummy no slouch nobody's fool on the ball on the beam practiced sharp as a tack up to speed

awkward clumsy green incapable incompetent inept inexperienced unable unskilled unskillful

coarse ignorant indefinite lazy rough slow stupid unintelligent