(from the title of Episode 11, season 1 of the game Criminal Case onFacebook): a gang's headquarters/hideout.
The Montreal Mafia's Viper's Nest is The Costansa Social club, in St Leonard, the Italian neighborhood of Montreal, Canada (called Santa Leonardi di Montreale in Italian by the Italian community)
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.