argot
noun/ˈɑːɡəʊ/
/ˈɑːrɡət/, /ˈɑːrɡəʊ/
[singular, uncountable] (from French)- words and phrases that are used by a particular group of people and not easily understood by others synonym jargonWord Originmid 19th cent. (originally denoting the jargon or slang of criminals): from French, of unknown origin.
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argot