Argot

n.

1.

A secret language or conventional slang peculiar to thieves, tramps, and vagabonds; flash.

Noun

1.

argot - a characteristic language of a particular group (as among thieves); "they don't speak our lingo" Synonyms: jargon, lingo, patois, vernacular, slang, cant

Aesopian language, Babel, Greek, babble, cant, cipher, code, cryptogram, double Dutch, garble, gibberish, gift of tongues, glossolalia, gobbledygook, jargon, jumble, lingo, mumbo jumbo, noise, patois, patter, phraseology, scatology, scramble, secret language, slang, taboo language, vernacular, vocabulary, vulgar language