An oxymoron used to describe an amount of some edible substance. Ususally implies an overlarge amount that, though considered healthy by the consumer, is generally accepted by the masses as "unhealthy".
Can also be used to describe habits, addictions, and things of that nature.
1. Pixie read a healthily unhealthy amount of manga in the last two hours.
2. Most BobLanders have a healthily unhealthy sugar addiction.