tongue-in-cheek

ironic and insincere

Synonyms: amusing, blithe, clever, comic, comical, dry, facetious, farcical, flip, flippant, funny, humorous, in fun, in jest, ironic, ironical, irreverent, jesting, jocular, joking, jokingly, joshing, kiddingly, laughable, not serious, playful, pulling one’s leg, putting one on, sarcastic, satirical, smart, whimsical, wisecracking, witty