noun
dirty worn-out rag
A cleaning cloth that is old, tattered, and dirty; often used figuratively to describe something or someone in a shabby, worn-out state.
彼はボロ雑巾のように疲れ果てていた。
He was exhausted like a dirty worn-out rag.
その古いタオルはもうボロ雑巾だ。
That old towel is already a dirty worn-out rag.