{adj. phr.} In an ironic or insincere manner. * /When the faculty complained about the poor salary increments, the university's president said that he was not a psychiatrist, thus making an inappropriate tongue-in-cheek remark./
TONGUE-IN-CHEEK
Meaning of TONGUE-IN-CHEEK in English
Slang English vocab. Английский сленговый словарь. 2012