Translation of "Snitched" in Japanese

Dammit, that pest Nagisa, she really went and snitched on me to the teachers.

くそー、渚のやつ、本当に先生にチクりやがった。

- Tell me why you have told on me to the teacher.
- Tell me why you snitched on me to the teacher.

なぜ君は僕のことを先生に告げ口したのか言ってくれよ。