demotic
Language as spoken or written by the common people.
countable, uncountable
Note the intrusion into British demotic (“me and Cheryl were having”) of the valley-girl quotative be, like.
2010, John C. Wells, accents map
Where it comes from
First attested in 1822, from Ancient Greek δημοτικός (dēmotikós, “common”), from δημότης (dēmótēs, “commoner”), from δῆμος (dêmos, “the common people”).
Adapted from the Wiktionary entry demotic (CC BY-SA 4.0).