Black Lives Matter. A movement by black
American (as well as allies of all races) to highlight and
fight racial injustice in the United States. The most glaring contemporary manifestation of this injustice is disproportionate unjustified police brutality against black
people (of all genders, ages, sexual orientation, etc), which gives the sense that the lives of black Americans are not important as everyone else. That's why the movement is so named, and not (contrary the ludicrous popular belief) that BLM seeks to make black lives above others.
John: I'm going to the BLM protest tomorrow. Do you wanna join me?
Jane: Nah, I believe all lives matter.
John: Which is why you should be supporting those whose lives seemingly
don't.
Jane: Oh, I get it now. I'll do some more research on BLM to find out how I can help.