demotic

dɪˈmɒtɪk

adjective

denoting or relating to the kind of language used by ordinary people; colloquial.

a demotic idiom

popular,vernacular,colloquial,idiomatic,vulgar,common,informal,everyday,non-literary,unofficial,slangy,enchorial

noun

ordinary colloquial speech.

he blinked in mild surprise at this uncharacteristic leap into the demotic