FACETIOUS
bantering, facetious, tongue-in-cheek
(adjective) cleverly amusing in tone; “a bantering tone”; “facetious remarks”; “tongue-in-cheek advice”
Source: WordNet® 3.1
Etymology
Adjective
facetious (comparative more facetious, superlative most facetious)
Treating serious issues with (often deliberately) inappropriate humour; flippant.
Pleasantly humorous; jocular.
Synonyms
• See also witty
Source: Wiktionary
Fa*ce"tious, a. Etym: [Cf. F. facétieux. See Facetiæ.]
1. Given to wit and good humor; merry; sportive; jocular; as, a
facetious companion.
2. Characterized by wit and pleasantry; exciting laughter; as, a
facetious story or reply.
– Fa*ce"tious*ly, adv.
– Fa*ce"tious*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition