Definition
A second-stringer is a substitute or reserve player on a sports team; someone who isn't a regular starter. They fill in when the main players are injured or need a break. The term can also apply more generally to anyone who is not the first choice or is considered less skilled. It implies a hierarchy where some individuals are preferred over others. Being a second-stringer doesn't mean you're bad; it just means you're not the coach's top pick. It's like being the backup dancer instead of the lead.