Amnesiarexic 

The act of forgetting to eat any of your three daily meals. This can be a result of a busy schedule or simply absentmindedness. This is most commonly the case with breakfast but also equally applicable to other meals.

One becomes amnesiarexic only if one is not anorexic in the first place i.e. the act of eating needs to already be part of your daily routine and thus to forget to do so makes one "amnesiarexic".

The most common symptoms of an amnisiarexic person include:

Indulgence in "Brunch"
Chewing of gum, pens or pencil top erasers
Stomach roaring sounds

"I'v been amnesiarexic lately, I keep forgetting to eat lunch because I'm so busy"

Amnesiarexic by Skywatermelon September 5, 2012

amnesiorexia

The act of forgetting to eat, sometimes skipping meals for extremely long periods of time. Most people with amnesiorexia skip meals because they work, sleep, or are otherwise occupied, not because they desire to lose weight, and most enjoy eating. Amnesiorexics commonly forgo eating or drinking for at least 8 hours while they are awake.

The best cure for amnesiorexia is having a constant meal time, but having small snacks throughout the day is also helpful.

Busy interns, students, and gamers often have amnesiorexia.

Kate eats lunch at 12 PM, but because of two long classes (with a short break between them) she forgets to eat again until 10 PM. Kate may be amnesiorexic.

Will and his friends start a game of Risk around 10 PM, and are so absorbed in the game they play until it ends at 6 AM. Will realizes he hasn't eaten anything since 8 PM last night. Will may be amnesiorexic.

amnesiorexia by fluorescent adolescent May 5, 2009