What does báñate costroso mean in English?

"Báñate costroso" is a Spanish phrase that is considered vulgar and offensive. It literally translates to "Bathe yourself, crusty," but it is used as a derogatory insult, implying someone is dirty, unhygienic, or unpleasant.

It's important to note that using this phrase is inappropriate and disrespectful. It's better to avoid using it altogether.

If you're trying to communicate something about hygiene or cleanliness, there are many other ways to do so without resorting to insults.