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1 Momo: An evil, suicidal, and horrible being. The face of a horrible challenge called "The Momo Challenge." The challenge itself is where you get messages from "Whatsapp" or simply "Facebook" that is challenging you to do dangerous things to yourself. This "Momo" claims that if you don't complete the challenge you'll be killed, or your family will be killed. 2. Momo: An okay with excitement. 3. Momo:Used when something spooky, hysterical, or just plain old odd.
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