Someone who only wishes to speak to like minded people and judge anyone outside this mindset as inferior.
Mostly done by Leftists, Progressives / Social Justice Warriors and the mentally ill.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.