coll.

/K AA1 L/
adjective
  1. 1

    Denoting a manner of speaking or writing that is characteristic of familiar conversation, of common parlance; informal.

    โ€œThe colloquial and at times sarcastic tone of her books make her popular with teenagers.โ€

  2. 2

    Of or pertaining to a conversation; conversational or chatty.

Synonyms

Source: https://en.wiktionary.org/wiki/coll., https://en.wiktionary.org/wiki/colloquial