What is a sentence proving the definition of frivolous?

The word frivolous is applied to things that don't deserve serious attention-though in some cases a thing described as "frivolous" is serious enough to be a legal matter. In its most basic, and oldest, uses, frivolous simply describes things of little importance. You can refer to anything you don't find worthwhile-from silly products to outrageous forms of entertainment to goofy pursuits-as "frivolous."