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Tornado Thursday is when multiple friends like and comment on every post in a social network to annoy a single user with mass amounts of notifications at one time.
3 friends: On Tornado Thursday, Nick, Duane and Billy like and comment using the hash tag #TornadoThursday on a friend named Josh Maint's wall. Josh Maint then gets hit with a ton of notifications and his posts show up in other people's news feed again (commonly known as a bump).

Note: Bonus points if you like all the old comments in the post as you effectively hit every user who has commented on said users posts in the past.
by Hole May 31, 2015
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