Nunga Bands are the original "jelly bands" or "shag bands" as they are now referred to. A trend in South Australian schools in the 80's they are black, similar to an O-ring but the size that will fit your wrist. If broken they have the same expectations as todays bands, meaning sexual penetration/favours to be bestowed upon the owner of the band
A girl wants to lose her virginity to a guy she like so breaks hi nunga band as sign shes willing
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.