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A group of roleplayers on Tumblr, with a surprisingly large fanbase, that extends into other fandoms.

Though Tronblr is known most for their slash and unapologetically self-aware crack they are also known for having rich and entertaining characterizations of those that they play.

Also there's crossdressing.
Tronblr just about exploded the other night. The Joker showed up.
by GridTheFinalFrontier May 10, 2011