grunt work

IPA(Pronunciation)

Noun

idiomatic uncountable

(idiomatic) Work (especially that which is heavy, repetitive or mindless) that is considered undesirable and therefore delegated to underlings.

Japanese Meaning

重労働や単調な雑用など、やりたくない下っ端的な仕事 / 嫌われがちな、責任を伴わない反復作業や雑務

As the new intern, she was assigned all the grunt work for the project, from data entry to filing.

新しいインターンとして、彼女はプロジェクトの雑用すべて、データ入力からファイリングまでを任されました。

Sense（1）

(idiomatic) Work (especially that which is heavy, repetitive or mindless) that is considered undesirable and therefore delegated to underlings.

He plans to hire somebody to do the grunt work of digging the trenches for the pipes.