Meaning of the word "tell on" in English

What does "tell on" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

tell on

US /tel ɑːn/
UK /tel ɑːn/
"tell on" picture

Phrasal Verb

1.

to inform an authority figure about someone's bad behavior

Example:
If you don't stop, I'm going to tell on you.
The little boy decided not to tell on his sister.
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