Realizing the morning after a drunken sex romp that you have already had sex with the same guy in the past.
"I rolled over and had a major case of deja vag...I totally fucked this guy over Spring Break!"
by MarchoftheSenguins April 29, 2010
The feeling of having already seen this vagina before.
I was banging this chick the other night and it was like Déjá vag, all over again! Maybe she has a twin.
by knathaniel May 26, 2010