A killer add-on in the multiplayer horror game "Dead By Daylight." Allows the killer to kill any of the four survivors once said survivor has been hooked at least one time. Note: there are multiple tiers of mori's in the game, that require specific circumstances or only allow you to kill one survivor; however, the rare add-on "Ebony Mori" is most commonly thought of with this phrase.
It should also be noted that playing as the following survivors will increase your chance of being mori'd (mostly due to community stereotypes):
Nancy Wheeler
Laurie Strode
Jane Romero
"Jane, you already know; gotta bring a Memento Mori"
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