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1.
A medical condition caused by over usage of the Microsoft application excel.

Symptoms include malfunction of the eyes from prolonged staring at this application and severe anxiety due to inability to rectify application errors such as circular references, amongst others.
User 1: "I can't get this stupid sumif to work in this vlookup because of the stupid pivot table!"

User 2: "Dude, you're suffering from excelitis, take a screen break!"
by Aquaxander January 04, 2008