Facetious a. : Given to wit and good humor; merry; sportive; jocular; as, a facetious companion.

Facetious a. : Characterized by wit and pleasantry; exciting laughter; as, a facetious story or reply.

Example:
Can anyone think of a funny way to use the word 'Facetious' in a sentence?

Taxonomy
Merriam-Webster Online Dictionary, tious, Dictionary, webster, Word Games, Webster Online Dictionary with audio pronunciations, glossary, english, language, ESL, adjective, Etymology, Middle French, facetieux, facetie, jest, Latin, inappropriately.

Defination from the web:
facetious from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... often inappropriately : waggish <just being facetious> 2 : meant to be humorous or funny : not serious <a facetious remark> synonyms see witty ...