P.A. stands for "Public Address"

It seems a train conductor in Chicago had some musings about the new Chicago smoking ban, which he shared with riders on an inbound commuter train yesterday.

Seems these musings contained a bad word:

Veering from his script notifying riders about the ban, the conductor used a vulgar sexual epithet over the Metra train's public address system to describe the city officials who enacted the ordinance.

Seems he's looking for a new job now.

For my part, I can't figure out what epithet he used, but I'm guessing it was close to "putz."