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

1.
半开玩笑地, 言不由衷地, 讽刺地
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.
他说他喜欢我的新发型,但我认为他是半开玩笑地说的。
•
The comedian delivered his political jokes with his tongue in his cheek.
这位喜剧演员半开玩笑地讲了他的政治笑话。