子こ供どもの使つかい

expression, noun

useless messenger; fool's errand; doing only as told

Idiomatic expression describing a person sent on an errand but unable to act independently, or the errand itself as a pointless task.

• 彼かれに任まかせても子こ供どもの使つかいで、結けっ局きょく自じ分ぶんでやる羽は目めになった。

  Even if I left it to him, it was like a fool's errand, and I ended up doing it myself.

• そんな簡かん単たんな交こう渉しょうもできないなんて、まるで子こ供どもの使つかいだ。

  Not being able to handle such a simple negotiation is just like a useless messenger.