fetticus

From Dutch vette kost (“fat food”).

fetticus (uncountable)

1. (US) corn salad or mâche, Valerianella locusta, a plant whose leaves are used in salads.
   • 1945, Maurice Grenville Kains, Five acres and independence: a practical guide to the selection and management of the small farm:

     Earliest sown or planted — round beet, peas, forcing carrot, lettuce, radish, early cabbage, peppergrass, mustard, spinach, kohlrabi, turnip, scallion, early potato, fetticus.