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argot

/ˈɑːɡəʊ/ noun

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about argot at Wordnik → Where our words come from →

  1. A characteristic language of a particular group (as among thieves).
    they don't speak our lingo

Origin

Borrowed from French argot, of unknown origin.

From Wiktionary, via Kaikki.org (CC BY-SA)