E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A maravedi (q.v.), a small obsolete Spanish copper coin of less value than a farthing.
What a trifling, foolish girl you are, Edith, to send me by express a letter crammed with nonsense about books and gowns, and to slide the only thing I cared a marvedie about into the postscript.Sir W. Scott: Old Mortality, chap. xi.