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3.
Nickname for the Atkin's diet, a diet based upon eating large amounts of meat and disgusting fat, but not being able to eat rice or bread. People who are on this diet are probably going to die of heart failure later in their lives.
Linda: I'm such a pig- I had a piece of bread yesterday. That's it no more carbs...let's go eat a pound of bacon now.
Jesse: Dude, Fatkin's sucks.
by Vick February 10, 2005
 
1.
Another name for the Atkins diet, since it endorses foods low in carbs, but often very high in fat, thus making the dieter fat anyway.
Tammy: "Shit. Look at me. Why am I so fat?"
Sammy: "Probably has something to do with that HUGE FUCKING TUB OF CRISCO you just ate. That was 100% bona fide LARD, bitch!"
Tammy: "No, that wasn't it, that was Atkins-approved so it has to be good for you. Oh...you know what it must have been...that one slice of Wonder bread I ate yesterday. Yeah, that must have had 7 or 8 grams of carbs. I never should have eaten it!"
Sammy: "Bitch I suggest you lay off the Fatkins diet and GET OFF THE FUCKING COUCH FOR ONCE!!!"
Tammy: "Are you kidding? Then I'd miss the 'Days of our Lives' re-run that's coming up. Hey, could you go to Wendy's and pick me up a triple bacon cheeseburger? No bread of course. I'm hungry."
by Nick D July 20, 2004
 
2.
A weight loss plan for the female morbidly obese in which the participant becomes pregnant and loses the pounds since she is now eating an exorbitant amount for two instead of one. Then at the end of 9 months, the participant tops it off by "birthing away" any remaining undesirable weight.
Did you hear about Jennifer? She was on that show I Didn't Know I Was Pregnant because she was so fat she didn't notice there was a baby in her. Ironically, she ended up losing a lot of weight.
Ah yes, the ol' Fatkins Diet
by Fatropolis April 19, 2011
 
4.
atkins with carbs, in other words, the diet most all of us are on all the time.
She's way too skinny - she should try the Fatkins Diet.
by Ron Rabie May 14, 2008
 
5.
The opposite of just about any diet. Eating whatever you want and generally relying on your metabolism to keep you fit.
"Man, I've lost 1O lbs on this new diet I started!"
"Dang dude, I've tried so many different diets, what's yours called?"
"The Fatkins Diet."
"Fatkins? What do you eat?"
"Mostly Mountain Dew and candy."
by MetaEnder November 29, 2009
 
6.
An all carb diet consisting of supersized soft drinks and generous helpings of devilish desserts so mouth watering it would make your ass grow just by looking at them.
The fat chick that just walked out of Mcdonalds with a large coke and 4 apple pies must be trying out the fatkins diet! I bet she got some birthday cake waiting for her at home too lawl!
by Omegastrike September 05, 2010
 
7.
A high-carb, high-fat diet, usually consumed in massive amounts right before bed.
Bob: "I ate, like, two Chinese dinners from the delivery place and just passed out on the couch. I always do this shit."
Tom: "Dude, you better lay off that Fatkins Diet."