rat on (someone)

Traduzioni
настучать на (кого-то)
He was known as the snitch who would rat on his friends.
Он был известен как стукач, который настучит на своих друзей.
Definizioni
To inform authorities or someone in charge about another person's wrongdoing or secret, often betraying their trust; to betray someone by revealing their misconduct.
Parole
snitch

noun
стукач