チクリ魔ま

noun

telltale; tattler; snitch

Colloquial, often used by children or in casual contexts for someone who secretly reports others' misdeeds. The 魔 suffix adds a negative, almost demonic connotation.

See also: ちくり

• あの子こはすぐ先せん生せいに言いいつけるチクリ魔まだ。

  That kid is a tattletale who immediately tells the teacher.

• チクリ魔まのせいで、みんなに秘ひ密みつがばれた。

  Because of the snitch, everyone's secret got out.