Top Definition
A disorder that causes people to loose muscle, and very hardly get it back. Usually develops within ages 15-25.
People with Complexia usually live for up to 9-10 more years after they get it.
Guy 1: "hey, why does that guy over there look so weak?"

Guy 2: "he's suffering from complexia."
by NothingMoreOrLessThanMars October 15, 2010

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