Social Justice Warrior Meaning

(neologism, often pejorative) An online activist who zealously promotes social justice causes.

Example: Used other than as an idiom: see social justice,‎ warrior; a social justice activist.
1995, Tim Dugdale, I Couldn't Care Less: A Novel, Black Moss Press (ISBN 9780887532764), page 33
  Conny was a local painter who had achieved modest fame in the Canadian art scene with his experiments in New Age macho realism: the sensitive male writ large as compassionate lover, social justice warrior and loyal son to Mother Earth.
1998, Daniel J. Faber, The Struggle for Ecological Democracy: Environmental Justice Movements in the United States, Guilford Press (ISBN 9781572303423)
  This book is dedicated to the memory of a great environmental and social justice warrior, mother, labor organizer, singer-songwriter, Earth Firstler activist, and much, much more Judi Bari (1949-1977)
2014, Krista D. Ball, Hustlers, Harlots, and Heroes: A Regency and Steampunk Field Guide, Tyche Books Ltd. (ISBN 9781928025030)
  How will your upper class social justice warrior cope with men swearing and pushing each other? Will she faint at the first sight of blood from a split lip? Or will she hike up her skirts, grab a hot soup spoon, and brain the first aggressor she can find?
2014, Joe Cooper, It's Not 'Unwisdom', It's Hubris -- Hubris often indicates a loss of contact with reality., soc.culture.usa, Usenet
  But the partisan liberals in the Obama adminstration think that the rules don't apply to them. They are blind to the dragon's teeth of division and mistrust that their social justice politics sows in the body politic. They honor and celebrate the "activist," the "community organizer" and the social justice warrior, whose proud life purpose is to "raise consciousness" of injustice and marginalization.
2014, Laura VanArendonk Baugh, Con Job, Æclipse Press (ISBN 9780985934965), page 101
  Daniel raised an eyebrow. “Do you happen to have an expert handy on toxic pesticides in the food supply?” Jacob blew out his breath. “No, but — hold on, yes, I might.” He drew out his phone. “Let me text my favorite social justice warrior.” Jessica might not know much about arsenic and pesticides, but she would certainly know who would.
2014, Thejendra B.S., Digital Wildfires: How to Become a Social Justice Warrior, Createspace Independent Pub (ISBN 9781500348861)
2015, Peggy Noonan, "The Trigger-Happy Generation", The Wall Street Journal, Vol. CCLXV No. 120
  Finally, social justice warriors always portray themselves—and seem to experience themselves—as actively suffering victims who need protection.