Just found out the origin of “grandfathered in”.
What else has a problematic history you didn’t realize until later?
“Off the reservation”. Like it’s obvious on its face if you think about it for two seconds, but it’s just an idiom, I never thought about it.
What the other guy said, it’s something you hear in like a cop movie where the chief says to the maverick hero cop “you’re off the reservation Johnson!” because he’s been doing maverick cop stuff.
I’m not super familiar with the idiom in common parlance, how is it usually used?