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the active worship of one Serj Tankian, lead singer of System of a Down. It can even be used for your religious views on Facebook. Followers of serjianity listen to all of Tankian's songs and have an unhealthy, but perfectly normal obsession with him.
"I asked Mary-Beth about the new poster in her locker, and she claims she's joined the First Church of Serjianity"
by Laurel_Storm August 06, 2009