rock the boat

US /rɑk ðə boʊt/
UK /rɑk ðə boʊt/
"rock the boat" picture
1.

波風を立てる, 事を荒立てる

to do or say something that causes problems, especially by upsetting people or by making changes to a situation that is currently stable

:
I don't want to rock the boat, but I think we need to address this issue.
波風を立てたくないのですが、この問題に対処する必要があると思います。
He's usually quiet and never rocks the boat at meetings.
彼は普段おとなしく、会議で波風を立てることは決してない。