A wordplay, deriving from the term Boston Brahmin.
This term originated from an
Indian WhatsApp group called 'Barter', which was originally created to share interesting ideas and other things. The group was also intended to be a platform that promotes social justice, especially
anti-caste ideas. But, after its creation, Brahmin
anti-caste SJWs started populating the group with a particular
anti-caste ideology and became intolerant of other
anti-caste ideologies. Even though their primary aim is to abolish caste system, they won't consider adopting other perspectives. Usually they appear as a group and dogpile on anyone who tries to present a different perspective.