frivolous Synonyms

worthless petty trivial slight trifling silly whimsical yeasty unimportant irrelevant unnecessary directionless airheaded empty-headed volatile vertiginous simplistic skin-deep skittish sleeveless stupid superficial thoughtless twopenny unconsequential featherbrained lightheaded recreational nickel-and-dime small-time noncritical uncritical nonobligatory birdbrained rattlebrained scatterbrained unappreciated unmeritorious unpersuasive Mickey Mouse meaningless tongue-in-cheek shoestring lighthearted lightweight footling piffling swingy one-dimensional penny ante