Entry
  1. Godan verb with 'ru' ending, Transitive verb, Intransitive verb

    to tell (on someone); to tattle; to snitch

    Colloquial

    くそー、渚のやつ、本当に先生にチクりやがった。
    Dammit, that pest Nagisa, she really went and snitched on me to the teachers.

Also written ちくる

Pitch on OJAD