Nagastias
A group of lunatics who started as a joke and then became the reason your whole school got in trouble.
"The Nagastias are coming to my house!", a kid who spilled juice on the teacher's desk."I joined the Nagastias because I like being a total pain in the ass.", a message from a kid who got sent to the office."The Nagastias are real, and they're gonna eat my brother.", a kid who stole his brother's lunch."