The Yason is a species of human that spends an entire day learning to play the guitar and masturbating when a university assignment is due. The Yason is also a virgin. The Yason is a dumb species.
Jessie: Yo Mr White, you remember the yason we came across in ABQ last week?
Walt: Yes Jessie...he never applied himself. He had so much potential *sighs*.
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.