Definition of "subculture"
A portion of a culture distinguished by its customs or other features, often in contrast to the larger mainstream culture.
Quotations
Like those activities, bodybuilding is an obsession, a living (for a few), and a way of life for the people involved in it—a subculture, in a word, with its own values, aesthetics and vocabulary.
1974, Charles Gaines, George Butler, Pumping Iron: The Art and Sport of Bodybuilding, page 7
verb
third-person singular simple present subcultures, present participle subculturing, simple past and past participle subcultured