Acronym for Quick Scopers Must Die. Created by a group of nonchalant video game users for Call of Duty(C) Modern Warfare 2. The group was made because of little kids shooting and getting kills and being "egotistical" about it. It primarily relates to S&D matches where this kid would be the last alive yet insist he use his sniper rifle instead of pulling out his machine pistol and winning the game.
"Hey man, wanna join QSMD and kill those little kids on COD?