Playing second fiddle means having a less important role than someone else. It describes a situation where another person is the leader or gets most of the attention, and you must accept being in a supporting position.
In an orchestra, the first violin leads the section while the second violin supports it. The second player is still important but does not lead.
In an orchestra, the first violin leads the section while the second violin supports it. The second player is still important but does not lead.
At work he feels like he is always playing second fiddle to his more confident colleague.