What is blm'er?

A liberally degenerate rich, white l.e.m individual, otherwise known as a white adherent of BLM.

I don't know or care if black/Caribbean people actually believe in BLM but you'd only be considered a blm'er in my book if you're white.

blm'er - meme gif

I don't know or care if some black people don't support blm, if you're non white you aren't a blm'er at least in my book.