I am looking for a single word for a person who gets addicted to a specific food item for a while, and then moves on to other, but is usually binge eating some specific food or the other. Example - My roommate got addicted to some chocolate and got one or two every day for a week, then she left it and got addicted to soup and kept drinking soup instead of breakfast or lunch, three to six packets in a day.
Colloquially, this is called a fetish.
I have a cheeseburger fetish right now.
However, even though fetish has a medical [psychiatric, sexual perversion] definition, the medical definition is rarely used in common American speech, unless speaking specifically of the sexual disorder.
So if you want addicted to indicate a medical problem rather than an eccentricity, it might be better to use the suffix -philia.
I have "cheeseburger- philia". I'm gaining weight like you wouldn't believe.
Still, this would be an absurdity.
Perhaps you may dare mint a neologism with the suffix "-aholic".
In "workaholic" it apparently worked out pretty well but I'm not sure how a word like "chocolateaholic" would be welcomed.