A noob glitch in mgo (metal gear online) where if you kill someone, then spray the head of your victim with bullets untill it fades, resulting in the respawned guy dying. This is because of the desyncronisation between death and respawn, making two of yourself.
Total noobs use it when they achieve a kill and know they won't be lucky enought to earn another.
Probably discovered by some guy playing mgo who killed a very annoying camper, so out of spite sprayed the body with bullets, only to find that the camper died again. Of course this honest man didn't tell anyone so no one would know, but his gamer girlfriend next to him couldn't keep her yap shut. Hence DL was born.
Me: WTF I just died after respawn.
Death loop Noob: ROFLMAO! 1 h45 h4xord joo w17 mi sk1115 !!!11121@!