For some reason, it really annoys me when people announce how little they eat. Such as skipping meals, saying they “forget” to eat, announcing that they haven’t eaten anything all day (or longer), stuff like that. Especially women. It annoys me because one, I can’t do that, sorry, I do need to eat, and no way can I go for long periods w/out doing so. It makes me feel kind of bad about myself sometimes. And two, I feel like comments like that help to perpetuate myths and bad stereotypes about body and weight issues with women.
Don't forget the people (especially women) who take 2 bites of food and then say they're "stuffed" and that they "pigged out."
Oh yes, how could I forget?? That one also drives me up the wall. I wish everyone would just keep their food/eating insecurities to themselves.
Sorry, I do both of these.

I really AM full after two slices of pizza, and probably regretting the second slice. I can eat a piece of toast and be full, or have a small milkshake and I won't be hungry for hours, even skipping dinner because of it. (I don't usually say I "pigged out" though, just that I am "full as a goog".)
I don't purposefully announce how little I had to eat, just sometimes I remember out loud "Crud Monkey - I haven't eaten yet today!" I have occasionally started getting ready for bed, and MG will ask "aren't you going to have dinner?" Completely forgot! But I am easily distracted, and have a really poor memory - I attribute things I did yesterday to today. I don't feel quite right sometimes, and the first thing MG does is ask what I have eaten that day. Often the cause; as I think about it,
today I have had a piece of cucumber and a SAO biscuit. Not really on purpose, just not paying attention. Yesterday, I probably ate quite a lot, although I know I had cheese on toast for dinner. Tonight's dinner will be a roast though, as I am going out. And I don't announce to others usually, and it never happens on a week-end, just while I am at work! I don't really have a proper lunch break, so that contributes to me not getting around to having something.
If it helps, I am not a skinny person saying "oh, I can't eat that; I already weigh too much" - I am fat.