My little girl asked me why I couldn't say "fish in troubled waters again" in front of the leader! How to answer is easy to understand?

Thirdly, the "fish in troubled waters" at work is not serious, not practical and derailed. If you say "fish in troubled waters again" in front of the leader, it means that you often don't work hard and cheat, so the leader will have an opinion of you and won't use you again.