adjective

not having any serious purpose or value.

frivolous ribbons and lacy frills

flippant,glib,waggish,joking,jokey,light-hearted,facetious,fatuous,inane,shallow,superficial,senseless,thoughtless,ill-considered,non-serious,flip,daft,frolicsome,sportive,jocose,impractical,frothy,flimsy,insubstantial,time-wasting,trivial,trifling,minor,petty,lightweight,insignificant,unimportant,worthless,valueless,pointless,paltry,niggling,peripheral