Similar to an "Irish Goodbye", a Puerto rican roll out occurs after consuming one too many tequilas and you silently disappear from friends and family before you're able to make more of a scene.
"Shit. I just finished 2 bottles of Patron and have licked 3 random people's faces. I'm also pretty sure I tried to use out table as a toilet. It's probably time for a Puerto Rican roll out!"