noun, noun or participle which takes 'suru'
leaving textbooks at school; not bringing study materials home
Student slang for the habit of leaving textbooks, notebooks, and other study materials at school instead of taking them home. Often used in the phrase 置き勉する.
テスト前なのに、また置き勉しちゃった。
Even though exams are coming up, I left my textbooks at school again.
置き勉が多くて、ロッカーがパンパンだ。
I leave so many books at school that my locker is stuffed.