A phrase used to express excitement. The term became popular after a video of a Lady Gaga fan shouting "Yaaass Gaga you look so beautiful" went viral in 2013/14.
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.