Shel·ta (shěl'tə) n. A secret jargon used by traditionally itinerant people in Great Britain and Ireland, based on systematic inversion or alteration of the initial consonants of Gaelic words. Also called Cant, Gammon.
[From Shelta Sheldrū, perhaps alteration of Irish Gaelic béarla, language, English, from Old Irish bélrae, language, from bél, mouth.]
secret language of Ir. tinkers, 1876, of unknown origin. It mostly consists of Ir. or Gael. words, with inversion or arbitrary substitution of initial consonants.