1) Gaseous particulate that emerges from one's butthole, known colloquially as a fart.
2) The condition of the atmosphere after a donkey has spent time in it.
1) Some asshole's ass air has really fouled the air.
2) I wish you'd keep your donkey outside; the whole room reeks of ass air.
"Jim caught his wife with another man at McDonalds; they were holding hands and everything!"
"Really, what happened?"
"Well she started trying to say the guy was just a friend"
"Seriously?"
"yep, I heard Jim kicked her ass to the curb, now she's staying with her 'friend' at his place."
"Man doesn't that beat all."
"Yes sir. I don't know how he's handling it so well... I would kill my wife if she was cheating on me, and then tried Blowing Air Up My Ass."