tongue in cheek

/ˈtʌŋ ɪn ˈtʃik/
adjective
  1. Said or done in a joking or ironic way, not meant to be taken seriously.
    • The article was a tongue-in-cheek guide to surviving family dinners.
    • His tongue-in-cheek comment about the weather made everyone laugh.
    • She gave a tongue-in-cheek apology that was clearly not sincere.
adverb
  1. In a joking or ironic manner.
    • He spoke tongue-in-cheek when he said he'd rather be at work.
    • She tongue-in-cheek suggested they start a club for people who love Mondays.
    • The teacher tongue-in-cheek told the class they could have homework every night.