A "diet" in which a feeding tube is inserted into your stomach through your nose, and provides a constant drip of a mixture of fats and protein. Supposedly you can shed lots of weight quickly. Can't believe anyone would actually do this! Also can't believe a doctor would do this.
http://abcnews.go.com/Health/diet-brides-feeding-tubes-rapidly-shed-pounds/story?id=16146271#.T491tVEecnQ