sycophantic, ingratiating, obsequious, fawning, servile, self-abasing, grovelling, subservient, wheedling, cajoling, crawling, cringing, Uriah Heepish, humble, toadying, hypocritical, insincere, flattering, adulatory, honey-tongued, silver-tongued, gushing, effusive, suave, urbane, glib, smooth, smooth-tongued, smooth-spoken, smooth-talking, slick, slippery, saccharine