Top Definition
The fake version of mononucleosis; it is used by its purported victims to gain sympathy and a socially acceptable boycott to physical activity for the duration of a normal case of mono.
Leland stopped training for the race when he contracted mono, but I think he's wimping out with a case of mononuclefauxsis.
by DioBo August 26, 2007
5 Words related to mononuclefauxsis

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