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English definition of “tongue-in-cheek”

tongue-in-cheek

noun, adjective  /ˈtʌŋ·ɪnˈtʃik/
intended to be understood as a joke, although often seeming serious: He made some tongue-in-cheek comment about being very busy cleaning his house.
(Definition of tongue-in-cheek nounadjective from the Cambridge Academic Content Dictionary © Cambridge University Press)

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