Fat max theory 

The theory that any individual can only absorb a certain amount a fat within a given time span. Therefore, once a person has reached their 'fat max' they will be able to continue gorging themselves without any further detrimental consequence.

After eating a full order of mozzarella sticks, potato skins, and spinach dip at TGI Friday's, Sara, an avid supporter of the fat max theory, realized that she had most likely reached her fat max for the night and therefore felt completely guilt-free when she ordered the cheesecake.

Fat max theory by Bubblegoose09 May 3, 2011

fatmaxxing 

A term used on 4chan's /lgbt/ board to refer to the technique of deliberately gaining weight in order to soften one's bone structure or accentuate features such as hips in the hopes that it will improve passing chances, a process typically (but not exclusively) undertaken by transfeminine individuals.

I thought my shoulder-to-hip ratio was going to be the death of me as far as passing goes but after fatmaxxing my hips have filled out enough to where it isn't an issue anymore.

fatmaxxing by fullbodyphallo October 1, 2022