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A condition where an individual isn't a mormon, but acts like he/she is by not doing drugs, alcohol, or before-marriage sex. See Also Strait Edge.

A condition where an individual isn't a mormon, but dresses and often looks like one.
Dave seems like he doesn't do drugs, drink, and is a virgin. Is he a mormon? No, my friend told me he's not, and that he's got mormonitis.

Then I saw Dave ride his bike on the side of the road. I thought he was one of those mormons who ride their bikes while dressed nicely, and wearing backpacks and nametags. But since Dave isn't a mormon (he wasn't wearing a nametag), then it became obvious that he had mormonitis.
by Ilisten2Metal June 04, 2014
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