鼻はなたれ

noun

runny-nosed child; sniveler

Literally a child with a runny nose; often used affectionately or teasingly for a young, immature child.

• あの鼻はなたれ小こ僧ぞうがまたいたずらをした。

  That runny-nosed brat got into mischief again.

• 昔むかしはよく鼻はなたれと呼よばれたものだ。

  I used to be called a sniveler when I was little.

noun

greenhorn; inexperienced person

Derogatory term for someone young, inexperienced, or immature, likening them to a sniveling child.

• まだ鼻はなたれの新しん人じんに任まかせるわけにはいかない。

  We can't leave it to a greenhorn newbie.

• 鼻はなたれのくせに生なま意い気きだ。

  He's just a sniveler but acts so cocky.