Allot of people diet on 100% meat +veggies. In fact its pretty common among pre contest bodybuilders. They might go 2,3,4,5, or even 6 days of protein + veggies, then have a carb up day.
IMO, this is the absolute most effective way to diet for fat loss.
When trying to lose bodyfat, you want your body to use bodyfat for as large a % of your daily caloric expenditure as possible without using any muscle tissue. Since carbs and fats are energy, when you cut them out, all energy must come from fat. (except for some glucose demands... which would vary depending on activity throughout the day..).
So what you do is go zero carbs and fats, and eat just enough protein to avoid catabolism. Along with fibrous vegetables ("negative calories", dietary fiber, lower insulin levels, tons of vitamins minerals and phytonutrients.), and some fish oil/evening primrose (EFA, boost metabolism, protein sparing, boost insulin sensitivity), and thats it. Carb ups as often as needed to sustain optimal thyroid and cortisol levels.
That = fastest possible fat loss with minimal muscle loss.
You can call that "The Tbombz Diet Principles."