Definitions by ChiBlonde

preexisting condition 

despite having a new girlfriend/boyfriend, sex with the ex is so good it must continue. Also known as Grandfathered in.

Guy 1: I cant go man I was up all night making sweet sweet love to Lisa.

Guy 2: Dude I thought you were seeing Veronica?

Guy 1: Lisa's a preexisting condition man! Shes Grandfathered in!!!

preexisting condition by ChiBlonde November 10, 2012