The phrase "told on" is often used to describe when someone reports or reveals information about another person to someone in authority. However, there are various other synonyms that can be used to convey the same meaning. These include "reported", "informed", "narc'd", "ratted out", "snitched", "dobbed in", "squealed", "grassed", "betrayed", and "exposed". Each of these words have slightly different connotations and levels of severity, so it's important to choose the appropriate synonym depending on the context and situation. Ultimately, they all refer to the act of revealing someone else's actions or information to others for the purpose of seeking consequences or punishment.