忘わすれん坊ぼう

noun

forgetful person

A mildly teasing or affectionate term for someone who often forgets things; common in casual speech and children's language.

• うちの子こは忘わすれん坊ぼうで、毎まい日にち何なにか学がっ校こうに忘わすれてくる。

  My kid is so forgetful; every day they leave something at school.

• また鍵かぎを忘わすれたの？本ほん当とうに忘わすれん坊ぼうだね。

  You forgot your keys again? You're such a forgetful person.