Has anyone ever done it before. Cause i'm going to try it. But i just want to know if its is a waste of time. If so, can u give me ur opinion on the kinds of recipes u made with the only meat diet? Please help...

sounds like the atkins diet. 0 carbs.
eat only meats, green vegies and cheeses
but you have to watch out for the effects of the high fat content.
(and 3 days won't do anything, try it for a few weeks)