Why waste time with costly courtship? Why frivol? Why fuss?
-- Robert William Chambers, The Green Mouse, 1910
My friend kept his countenance admirably; and well he might, for five minutes later we arrived, always by the purest of chances, at a place where we could play cards, and also frivol with Louisiana State Lottery tickets.
-- Rudyard Kipling, From Sea to Sea, 1889
Frivol is a back formation of the word frivolous which arose in the 1860s. Frivolous comes from the Latin word frīvolus meaning "worthless."