This is the "release group" or scene group tag. Groups like NBQ rip content from official paid sites and encode them to share on the web.
This typically stands for "Episode 131." It indicates that the file is a specific scene or episode from a larger ongoing series or website update. NickMarxx E131 Zoey Foxx XXX 1080p MP4-NBQ -XC-
This guide breaks down exactly what this specific file name means, how to interpret its various tags, and best practices for internet safety when searching for digital media. Anatomy of the File Name This is the "release group" or scene group tag