When you finally get your dinner served after a 5 hour wait @!!!!!!
"Ka-Cacha-Ka" makes reference to the Nigerian plate Chakalaka which most natives agree that although takes a long time to be served, once the dish is served the sensation of relief is just "Ka-chacha-ka" and we, natives, just can't help but smile.
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.