(s)slickmade slick by e.g. ice or grease“sidewalks slick with ice”, “roads are slickest when rain has just started and hasn't had time to wash away the oil”
(s)facile, neat, slicksuperficially impressive, but lacking depth and attention to the true complexities of a subject“too facile a solution for so complex a problem”, “it was a neat plan, but bound to fail”, “a slick advertising campaign”