Of or relating to a theory or view of society that (excessively) emphasizes the importance or centrality of the working class; advocating or upholding such a theory or view. Also more generally (especially with depreciative reference to members of the middle or upper classes): of, relating to, or supporting the working class and its rights and interests.
A person with a workerist view of society. Also more generally: a person, especially (depreciative) a member of the middle or upper classes, who advocates or supports the rights and interests of the working class.
1950s. From worker + -ist, after French ouvriériste ouvrierist.