frivolEtymologyFrom French frivole, from Latin frīvolus (“trifling, worthless”).frivol means an unserious person; a shallow person. Lexicurio rates it Sui generis — a strength score of 90 out of 100.nounAn unserious person; a shallow person.An idle diversion or pastime; a frivolity.verbTo behave frivolously.““I will act, dance, ride, frivol, talk scandal, dine out, and appropriate the legitimate captives of any woman I choose, until I d-r-r-rop, or a better woman than I puts me to shame before all Simla, — and it's dust and ashes in my mouth while I'm doing it!””To trifle.