Gipsy language, the speech of the Roma or Zincali. This has nothing to do with Rome.
“A learned Sclavonian ... said of Rommany, that he found it interesting to be able to study a Hindu dialect in the heart of Europe.” —Leland: English Gipsies, chap. viii. p. 109.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894