The story
Unknown, but claimed to be a coinage of Percy Adolphus Vaile in the early 20th century (see quote below). Compare urban, -ity, city. Not to be confused with urbanity.
Etymology from Wiktionary, CC BY-SA 4.0.
urbacity
Today it means: An extreme or exaggerated pride in one's city; an insular view of one's city. Full definition →