no one really knows what it means. stupid people just keep saying it over and over, and it drives other people insane.
it acts as an insult, a random sound, a verb, anything! it's very flexible :o
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.