1) one who tries to break apart a union
by clearly and willingly stating an unpopular opinion to enrage most of the population and cause them to fight each other
2) the opposite of a union
, a bunch of people who act cynical and sarcastic with each other
example of both definitions:
"Man, we were having a real great time discussing anime
the other day when this uniju came in and messed everything up. It turned into a real uniju fast."
"Dude, you are such an otaku