A common phrase that means to kill one's self; preferably with a shotgun to the head but the phrase does not have to be so specific to the ways in which one commits suicide. This phrase is usually used to emphasize one's failure in something, in return gettig "epic lulz".
Average white male #1: Dude, my girlfriend said I was a loser because I live with my mom.
Average white male #2: Dude, good Lord! Cobain yourself!