A word accidentally used when a gymnast is trying to talk about what they do, but can't stop thinking about your monster cock and/or bukakke.
Person 1: So at my gym yesterday, I did a triple back-hand spring for the first time.
Person 2: That's just lovely (Pretending to give a fuck)
Person 1: Yes, being a jizznast is amazing! Oops, sorry, I meant gymnast.
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.