Rookie Level 1 Gamer: "They're called boomer shooters because they're old like baby boomers"
Veteran Level 20 Gamer: "Baby boomers thought Doom was satanic, that's a stupid term"
Enlightened Level 60 Gamer: "They're called boomer shooters because of the huge debt they owe to the original Doom modding scene and therefore "Boom", one of the first limit-removing source ports"