No sea igualado

[poli]

I think this is a Colombian expression that means don't be rude, Would this be understood in other countries as well?

In English, it seems kind of old fashioned like know your place.

[AngelicaDeAlquezar]

It's definitely "know your place".
When you feel in a higher level of hierarchy (socially, morally, economically, etc.), and someone you find inferior treats you as an equal or disrespectfully, you use this expression. Widely used in Mexico too.

- Ese niño es un igualado. Les habla de tú a sus mayores. (That kid is very disrespectful. He calls "tú" his elders.)
- Señor, no sea igualado. Ni me conoce y me está insultando. (Sir, don't be rude. You don't even know me and you're already insulting me.)
- Mírame a los ojos cuando te hable. No seas igualada. (Look at me when I'm talking to you. Don't act like you don't care.)
- No te contrataron por igualado. ¿Cómo se te ocurre sentarte a la misma mesa que el jefe? (You weren't hired because you don't know your place. How can you go and sit at the boss' table?)