A psychological disorder. Usually occurs when a person pledges a fraternity and suddenly thinks they're hot shit, despite being, in fact, the same exact person as they were before bid day. Symptoms include sleeping in khakis; being rude, arrogant, standoffish, aloof, or dismissive toward GDIs; and belligerent/excessive swagger.

Pledgitis usually peaks during the pledging season and recedes with initiation, when the novelty of being a brother begins to wear off. At this point, the person in question will usually revert to his or her normal self.

How a pledge deals with his pledgitis will decide whether or not he will become a true fraternity man or a simple frat boy. Whether or not a fraternity sees pledgitis as a temporary phenomenon or as a permanent staple has a large part to play in its ethos.

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