A living thing, usually a person, who is unable to perish/die. This, however, doesn't mean said person or thing cannot be injured (see involnerable) or sustain physical damage. A prime example of immortals are vampires, KK's farts, and KK Macleod.
Computer slang term for a spontanious computer program glitch that results in the computer user showing uncontrolled agression towards the source of said glitch. This phenomina is most often experianced during the enjoyment of recreiational programs, such as video games.
"Fucking Blizzard games are full of so many Bastard Twats that I put my fist trhough the screen!"