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The "Watermelon Diet" is the term used to describe the rapid weight loss that accompanies the late stages of a terminal illness, more specifically the AIDS virus. The term was coined by a lifelong closeted homosexual performer, Liberace, who close to the end of his life publicly denied having the AIDS virus, and instead attributed his recent weight loss a result of a "watermelon diet" he was on.
1. - Did Freddy Mercury have full blown AIDS when Queen recorded "The Show Must Go On"?
-Yeah, he was really thin, he was definitely on the "watermelon diet"

2. - Hey Dave you look like you lost some weight? Either your taking really good care of yourself or you're on the "watermelon diet?"
by johnteb September 25, 2010
Happy St. Patties Day!