with your tongue in your cheek
US /wɪð jʊər tʌŋ ɪn jʊər tʃiːk/
UK /wɪð jʊər tʌŋ ɪn jʊər tʃiːk/

1.
半開玩笑地, 言不由衷地, 諷刺地
said or done in an ironic, insincere, or facetious way
:
•
He said he loved my new haircut, but I think he said it with his tongue in his cheek.
他說他喜歡我的新髮型,但我認為他是半開玩笑地說的。
•
The comedian delivered his political jokes with his tongue in his cheek.
這位喜劇演員半開玩笑地講了他的政治笑話。