Be out of line
Meaning
To behave in a way that is inappropriate, disrespectful, or exceeds acceptable social or professional boundaries.
Origin
The phrase "out of line" likely draws its origins from the precise world of military drill and formation. Soldiers were expected to maintain perfect alignment, marching shoulder-to-shoulder in straight "lines." To step "out of line" was to break ranks, to disrupt order, and to defy discipline—an act of insubordination that could have serious consequences on the battlefield or during a parade. This vivid image of failing to adhere to strict boundaries, initially military, quickly extended into civilian life, where it now describes any behavior that deviates from accepted social or moral standards, suggesting a failure to maintain decorum or respect.
Examples
- His comments during the meeting were completely out of line and offended several colleagues.
- You were out of line speaking to your mother like that; apologize immediately.