When someone usually says that you have permanent dirt in your fingernails, what does that mean?

Does that means the person will always have dirty fingernails or its very hard for them to clean because their fingernails, the dirt always comes back.When someone usually says that you have permanent dirt in your fingernails, what does that mean?
Every day dirt is accumilated under nails but if you wash daily it goes away. Only if you are a mechanic will you have permanent dirty nails.When someone usually says that you have permanent dirt in your fingernails, what does that mean?
It means they have dirt under their fingernails, and it seems to be staining their nails. What is that person doing with their hands anyway? And where are those hands intending to be? I would be buying nail scrub brushes and doing a free manicure if those hands were heading toward me!!!
It means that you have permanent dirt in your fingernails. WHAT else could it mean. DUUUUUHHHHH!
interesting question....but i dont know??