1. A gang/mafia term, regarding a shooting hit or assassination in which a bullet leaves or should leave an exit wound large enough for air to pass through. The act of air traveling through such a wound.
Also, a cover name for various hire-to-kill gang/mafia business fronts.
"Did we see Johnny lately? Let's just say he got some Air-conditioning put in..."
"Oh yeah, I put in Bob's Air-conditioning alright."
"I work in the Air-conditioning business."