► 名詞告げ口 [つげぐち] [
告げ口する]
meaning: tell on rank: 3☆
彼女は
彼のことを
先生に告げ口した ⇨ She informed on him to the teacher
(☛ Usually at personal level, children to parents, teachers, etc.)More examples:- 彼はタバコを吸っていることを教師に告げ口した生徒に仕返しをした ⇨ He retaliated against the student who informed on his smoking to a teacher