tongue-in-cheek
adjective
[ tʌŋɪnˈtʃiːk ]
• ironic, flippant, or insincere.
• "her delightful tongue-in-cheek humour"
tongue-in-cheek
adverb
• in an ironic, flippant, or insincere way.
• "he claimed then he was speaking tongue-in-cheek"
tongue in cheek
• in an ironic, flippant, or insincere way.
• "one suspects that he is writing with tongue in cheek"