What do you mean?
1. If someone rocks the boat, they are disrupting a stable,
settled situation, usually by interfering, or by trying to do
2. If someone tells you, not to rock the boat, they mean
that you shouldn't do anything that would upset or change the way things are.
1. "Everything was going fine, until she came along and rocked the boat. Now, no one seems to get on any more.
2. "I think it's time we changed the rules, don't you?"
"I wouldn't rock the boat if I were you. Everyone else seems
happy with the way things are."