v. To dance in a chair (Normally a computer chair, but doesn't have to be.) while sitting. Sometimes done when listening to a cellcert, when bursting out into song (randomly or otherwise) or just because you feel like it
Angel bursted out singing "Oops I did it again" and she started chairdancing.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi