Leading a hedonistic and/or narcissistic lifestyle that would result in one being "left behind" when the alleged christian rapture allegedly happens and all the alleged "good" christians are taken to an alleged heaven. Thus leaving behind all the people not desired by the alleged christian alleged god.
Dan: Babe, you are so going to get left behind with that attitude.
Michelle: You mean with all the cool people?
Dan: Um, ya. Never thought about it like that before.