An abbreviated version of "but her emails". In the early stages of the Trump Presidency, "yeah, but, her emails," became the sarcastic rebuttal to anything terrible that Trump did. Implying that Trump was elected because the alternative, a secretary of state having an unsecure email server, was obviously much much worse. "But her emails" has contracted to "buttery males" over time.
12 step recovery jargon referring to someone new who talks about how great life is, now that they're sober. 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.