adjective

(of words or a speaker) fluent but insincere and shallow.

the glib phrases soon roll off the tongue

slick,pat,neat,plausible,silky,smooth-talking,fast-talking,smooth,urbane,smooth-tongued,silver-tongued,smooth-spoken,fluent,voluble,loquacious,disingenuous,insincere,facile,shallow,superficial,simplistic,oversimplified,easy,ready,flippant,flip,sweet-talking,with the gift of the gab