Home › Words › M › marrowfatmarrowfatmarrowfat · noun — A large variety of pea that is often processed and sold in tins/cans.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom marrow + fat.nounA large variety of pea that is often processed and sold in tins/cans.e.g.“Peas are scarce; good marrowfats are in better demand.” — 1842, Charles Mason Hovey, Magazine of Horticulture, Botany, and All Useful Discoveries, page 319:Definitions & examples from Wiktionary (CC BY-SA 3.0).