Word used mainly by American teenagers and those without a college education to describe the frustration they feel at their own failures in life.
Most of these individuals don't feel the need to get an official definition of this word to see if they believe in equality of opportunity for example, rather they will go to tumblr or find an extreme feminist vlog and confuse social justice with other disturbed individuals who abuse the concept for their own personal gain.
Social justice is ruining gaming
Social justice is communist
Social justice is feminism