Epideixis is an event held only for Collegemen (i.e. not for Commoners) in VIIth chamber on the night before the first game of X's, the original purpose being as an exercise in cheer-leading for the game. It involves the Captain of X's asking a list of questions of the form "Who is the..." or "Who does..." (identifying people or groups of people by their notional names, or activities that they may have perpetrated). The relevant people then run into the centre of the chamber shouting "Co-o-o-llege!", prolonging the first syllable as much as possible. The last group to be called up is invariably "The Hot" (the scrum in the College X's team). It is still very much as it was, though the questions are now subject to a mild degree of censorship.
Read more about this topic: Notions (Winchester College)