tell on
US /tel ɑːn/
UK /tel ɑːn/
1.
настучать на, донести на
to inform an authority figure about someone's bad behavior
:
•
If you don't stop, I'm going to tell on you.
Если ты не перестанешь, я настучу на тебя.
•
The little boy decided not to tell on his sister.
Маленький мальчик решил не настучать на свою сестру.