patois
/ˈpætwɑː/noun
(复同单/-wɑːz/)
1- the dialect of the common people of a region, differing in various respects from the standard language of the rest of the country方言, 土语：
the nurse talked to me in a patois that even Italians would have had difficulty in understanding.
那个护士和我说话所用的方言即便是意大利人也很难听懂。
1.1
- the jargon or informal speech used by a particular social group黑话, 行话, 圈内用语：
the raunchy patois of inner-city kids.
内城年轻人淫秽的圈内用语。
词源
mid 17th cent.: French, literally 'rough speech', perhaps from Old French patoier 'treat roughly', from patte 'paw'.