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2 definitions by Michael Likesit

 
1.
When a girl goes a period of time with jizz as her only intake / nourishment. Sometimes used as a very effective short-term method of weight loss, other times as part of domination & submission play. Rules vary; sometimes other drinks are allowed but rarely is any food permitted.
"She really pissed me off, so I gave her two days of the jizz diet."

"I made it four days on the jizz diet and lost five pounds."
by Michael Likesit June 14, 2006
 
2.
A female (or a picture of a female) that is hot enough to make it worth jizzing upon.
"That girl has the best eyes and face - definitely jizzworthy!"
by Michael Likesit June 14, 2006