Top Definition
a disease deeply affecting the brain and mouth as a result of one saying too many "your mom" jokes.
Cassidy - "Doctor! Doctor! Something is wrong with me!"
Doctor - "What seems to be the problem?"
Cassidy - "Your mom's a problem!"
Doctor - "Oh no.. it seems you have a rare case of yourmomitis.."
by your mom has a fake name September 05, 2011

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