MM2 commonly refers to Murder Mystery 2, a Roblox game created by Nikilis in which players receive roles such as Innocent, Sheriff, and Murderer. Audio associated with these roles became useful shorthand in gameplay videos, compilations, and short-form edits. The Innocent cue remains recognizable because it immediately frames the player as vulnerable and focused on survival. It often appears alongside other Roblox audio, including the Roblox oof, although the two sounds serve different moments in an edit.