colloquial
Definition of abbreviation (noun) -
conversational; not used in formal speaking or writing; informalPart of speech:
AdjectiveHe had spent years honing his colloquial skills.
It may be that when we express our opinions, we only have available to us ready-made sets of ideas, "discourses", other people's words which we choose from, string together in different ways and think (mistakenly) to be our own; these include 'expert' ideas and the colloquial, common-sense versions of them absorbed by ordinary people in one way or another.
The colloquial reference indicated the free spirit of the group.
When you listen to the difference between spoken colloquial conversation and written work, you realize how good an ear a novelist must have to write authentic dialogue.