and when you eat beef sweetrolls etc you gain weight! eh? get the picture?
if this mod could be done it would be grety appreciated
and for the time being
As Kieran has said, the face can become fatter, but i'm afraid that that's about the limit, although as you asked for food to make you fatter, maybe a script effect could read puff out your face more.
However we could be wrong and a super modder could help you.
Maybe add something to the body's mass as you eat like underwear on the men but i think that would make everyone fat or just make it affect the player and make an option so when your makeing AI's in the CS you can choose to make them fat or something.
Is that Possible?
To give a little summary of the previous topics:
It has been tried before, but it will not give the desired results, it would unable you to wear anything that is in the game, animations will malfunction and it'll pose even more problems and definitely wouldn't be advisable to do.