Mumblecore films have been around since 2002 with the feature Frances Ha Ha. A long catalogue of films branded with the mumblecore genre have been produced since then.
Mumblecore is a subgenre of American independent film. Mumblecore obtains its signature from the use of low production budgets, amateur actors and improvised/natural dialogue. Nontraditional camera movements and long takes are other notable characteristics of mumblecore film.
Eric Masunaga, a sound editor for a low-budget film, coined the term “mumblecore.” The term came about when Masunaga was at the 2005 South by Southwest Film Festival. He was asked to describe the similarities in three low-budget films, he replied with the term “mumblecore.”
Other terms like “bedhead cinema” and “D.I.Y. film” are nicknames for it.