A much worse version of down bad. Some would say it's an expansion to down catastrophic.
Alex : damn bro my Brazzers subscription expired. Now I have to watch free porn.
John : Bro you had a Brazzers subscription? God damn you are down astronomically.
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.