Tryna bouta (aka trynboutta) is clearly a combination of "tryna" and "bouta." While being more promising than "tryna," its more casual than "bouta." This word can be used anytime.
"Yo Dom, you tryna bouta hit up this party tonight?"
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.