Murder Mystery 2 is a long running Roblox game where one player is secretly the murderer, armed with a knife, while the others try to survive and identify them. This short stab effect comes from that role and is heard at the moment of a kill. As MM2 edits spread across YouTube and TikTok, the sound became shorthand outside the game too, used alongside other gaming clips like the Roblox Explosion Sound in compilations and soundboards. Its brevity and instant recognition keep it popular for fast paced meme editing.