The keyword term functions as a compound proper noun. It operates as a single lexical unit that names a specific subgenre of creative work, specifically a category of fanfiction. Its primary grammatical role is to act as a label or title, identifying a particular type of content.
A detailed grammatical analysis breaks the term into three components. "911" is a proper noun (the title of a television show) used adjectivally to modify the entire phrase, establishing the source material. The symbol "x" acts as a relational conjunction or preposition, a convention in fandom vernacular to signify a romantic pairing. "Male reader" is a compound noun, where "reader" is the head noun and "male" is a descriptive adjective. "Reader" itself signifies a specific type of characteran audience surrogatecentral to the reader-insert genre of fiction.
In practical application, this noun phrase serves as a precise metadata tag or search query within digital archives and social media platforms. By classifying it as a noun, one understands its function not as a description of an action or quality, but as the definitive name for a niche literary category. This classification is crucial for organizing, searching, and identifying content that features a romantic relationship between characters from the show 9-1-1 and a male-identified reader-insert protagonist.
