pluralmultiplesubject
The term "pluralmultiplesubject" is not a recognized linguistic or grammatical term. It appears to be a portmanteau, combining "plural," "multiple," and "subject." In linguistics, a subject is the noun or pronoun that performs the action of a verb or is described by an adjective. A plural subject refers to more than one subject. A multiple subject could refer to a compound subject, which consists of two or more subjects joined by a conjunction, such as "John and Mary went to the store."
However, "pluralmultiplesubject" as a distinct concept does not have a standard definition or usage within grammar