pig in the python
n.— «It is a population segment that will grow 27 percent by 1990, and that portion of American womanhood that Gilbert Maurer, president of Hearst Magazines, lovingly characterized as ‘‘the pig in the python.’’» —“Advertising; Redbook Rejuggles Its Image” by Philip H. Dougherty New York Times Feb. 11, 1983. (source: Double-Tongued Dictionary)