tongue in cheek for learners of EnglishPowered by COBUILD
A tongue-in-cheekremark or attitude is not serious, although it may seem to be. ⇒ ...a lighthearted, tongue-in-cheek approach. ⇒ This is all slightly tongue-in-cheek, I'd like to make that clear. ⇒ Were they written tongue-in-cheek, or with an underlying conviction?