put (one) on the sidelines
1. sports To keep a player from participating in a game by or as by instructing them to remain on the sidelines of the field or pitch. Oh, I have no problem putting Robby on the sidelines for this week's game—those are the consequences for being late to practice!
2. By extension, to keep one from actively participating in something; to limit one's involvement in something. I know I was out of the office last week, but I can't believe the boss put me on the sidelines for the new project.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.