Used when you can no longer be bothered with conversation. It is a quick and easy way to get the point across that the person who is talking to you is painfully boring and should go find a nice lil' place and meet Mr. Grim. It is also a useful way of saying no.
"Hey, can I borrow Metal Gear?"
When a person is being annoying, and needs to die and get out of your miserable life; you tell them to go die.
John: Hey dude, hows your mom?
John: I fucked your mom last night...
Matt: Go die.
When people are being excessively annoying and you can not stand to talk to them or watch them live for another second you simple tell them to go die
annoying person: Why are you so mean to me?
Nerden : Why are you living?
annoying person: huh?
Nerden : can you like just go die or something
annoying person: Thats just awful!
Nerden: k like your heart needs to stop beating now
annoying person: WHAT??!!
Nerden : gosh just stop breathing and die!