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.