dirty laundry
"Dirty laundry" refers to clothing and textiles that have been worn and require washing due to dirt, sweat, or stains. It is often collected in a basket or bag until there is enough to justify a wash cycle. The term can also imply the need for regular cleaning to maintain hygiene and freshness in one's wardrobe.
In a broader context, "dirty laundry" can symbolize personal or private matters that are not meant to be shared publicly. This expression is often used when discussing sensitive issues or scandals, suggesting that revealing such information can lead to embarrassment or conflict, much like exposing unwashed clothes.