fat farm noun a facility where people go to lose weight through a regime of exercise and proper diet US,1969
The Golden Door! America’s most sumptuous and blue-blooded fat farm! A jeweled oasis of sauna baths and facials, pedicures and manicures, dancing lessons, herbal wraps and gourmet cuisine! — Armistead Maupin, TalesoftheCity, p. 186, 1978