"Se te va a pasar el arroz"= your rice is going to go off*

You are going to be left on the shelf. This expression is typically said to women, although not exclusively. Some people may go for a religious version: "Quedarse para vestir santos" as if you were a nun / monk.

"Odio que mi abuela me diga que se me va a pasar el arroz" "Dicen que se le va a pasar el arroz /que se va a quedar para vestir santos esperando a su media naranja"