The definition of argot is a special or secret language or jargon used by two or more people.(noun)
An example of argot is pig latin.
See argot in Webster's New World College Dictionary
Origin: Fr, orig. (in thieves' jargon), the company of beggars (argoter, to beg, prob. < ergot, claw, spur, hence orig., “get one's claws into”)
See argot in American Heritage Dictionary 4
Learn more about argot