second string(redirected from a second string)
The substitute players who replace the starters (or "first string") as a game goes on. A player on the second string is considered the second best player in that position. I'm only a freshman, so I'm thrilled to be second string. Just making the football team at all is exciting! Those guys need a breather—send in the second string.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.