Is when you realize you've eatten something a few minutes ago, but have no idea of what or how much. Happens when eating while distracted, i.e. watching TV or while talking to a friend who is playing a videogame in front of you.
A waking person's version of sleep eating.
Girl 1: Did you hear that Amy Winehouse fainted again last week? Colin says she has lung cancer
Girl 2: Let me just finish my lunch here or i'll have nomnesia again and put on another 5lbs. This chicken salad is so good, i have to will myself not to get seconds