"You are already a thing of the past."
It expresses a feeling of finality and detachment from the person being addressed. It suggests that the relationship or connection with that person is over and done with, and they are no longer relevant or important in the speaker's life.
Here's a breakdown of the phrase:
* tu: you (singular, informal)
* ya: already
* eres: are (singular, informal)
* cosa: thing
* del: of the
* pasado: past
The phrase emphasizes the permanence of the separation and suggests that the speaker has moved on. It can be said in a hurtful or dismissive way, depending on the context and the tone of voice used.