Which nickname is associated with the enforcement unit of the Hells Angels?

The nickname associated with the enforcement unit of the Hells Angels is "Filthy Few." This term specifically refers to a select group of members within the Hells Angels who are tasked with carrying out the organization's more violent and enforcement-related activities. Being a member of the "Filthy Few" is considered a significant honor, as it reflects the individual's dedication and loyalty to the club, as well as their willingness to engage in the more dangerous aspects of organized crime that the Hells Angels are involved in.

This designation often indicates that those involved are heavily initiated and have proven themselves through acts of bravery or loyalty to the Hells Angels. Other terms like "Warriors" and "Blood Brothers" may be used in different contexts or by other organizations, and while "Goon Squad" suggests a focus on enforcement, it is not specifically linked to the Hells Angels as the "Filthy Few" is. Therefore, the correct answer highlights the specific identity of a unit within the Hells Angels that is renowned for its enforcement role.