A feeling of having seen somthing/sombedy before, even if you haven't
Opposite of jamais vu.
situation that happened before !
it's a French ex<x>pression, literally means.. been here before .... it's far feeling you get when half way through doing something, it his you that you have a memory of this time and place .,.. whether you dreamed it, imagined it or what, you feel you are revisiting an earlier scene