A plastic bag, placed over the user's head and often used with an inert gas such as helium, thus ending all the user's problems.
May be home made or purchased pre-assembled. One should always find a luxurious, high-end exit bag and purchase it with a credit card.
Joe: "I'm pretty sick of life. I'm thinking about eating a bullet."
Betty: "Joe, I think you should consider using an exit bag. It's quick, painless, and a much better option if you want an open casket."