play second fiddle
to be less important or in a weaker position than someone else:
to be in a subordinate position to someone.
if you play second fiddle to someone, they are in a stronger position or are more important than you (usually + to )
-----------------------------------------------------------------------------------
I'm not prepared to play second fiddle to Christina any more - I'm looking for another job!
[나는 Christina 종노릇 더 할 준비가 전혀 안 되 있거든! 다른 일 알아볼거야!]
I'm tired of playing second fiddle to John.
I'm better trained than he, and I have more experience.
I shouldn't always play second fiddle.
-------------------------------------------------------------------------------
You'll have to choose between your wife and me. I won't play second fiddle to anyone.