A place famously known for 'where you control the action', that is the Jamberoo recreation park not the town, Jamberoo is actually a hole, with hills all around it often fills up with water. Most people living in Jamberoo are related, your next door neighbour is often your cousin and you have had kids with one of your other cousins. People from Jamberoo often have people say to them 'take your cow shit back to jamberhole' as people from Jamberoo are known for pretty much living in cow shit.
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.