"To understand what qualifies as mumblegore, you must first understand the concept of mumblecore. Mumblecore is a genre of indie films that have these key characteristics: low-budget production, naturalistic acting and dialogue, character-driven plots with a focus on relationships, and actors who often improvise lines. Clerks (1994), John Cassavetes, and Gus Van Sant are considered early influences.
Mumblegore utilizes these same techniques in horror, and there are many overlapping key players with mumblecore, such as the Duplass brothers, Greta Gerwig, Joe Swanberg, and Adam Wingard. Logan Ann Taylor of Split Tooth Media called it the "predecessor for the Blumhouse Productions house brand of horror: small, low budget, scrappy and original films." The trend faded in the 2010s, and many of the filmmakers attached to mumblecore oppose the label, but it became a recognizable genre nonetheless."
