WordNet (r) 3.0 (2006):
tongue-in-cheek adv 1: in a bantering fashion; "he spoke to her banteringly" [syn: banteringly, tongue-in-cheek] 2: not seriously; "I meant it facetiously" [syn: facetiously, jokingly, tongue-in-cheek] adj 1: cleverly amusing in tone; "a bantering tone"; "facetious remarks"; "tongue-in-cheek advice" [syn: bantering, facetious, tongue-in-cheek]