I have no idea where EB got the expression, but she’s been using it for years.

Pig-on-Pork is worse than excess – its excessive excess.

Example: putting whipped cream on ice-cream would be Pig-on-Pork.

This article in Broadcaster Magazine about the recent CRTC hearings in Vancouver has a fine example…

One area that did seem to win consensus from many of the private broadcasters was the controversial nature of the CBC’s presentation. They were seeking the 104.1 FM frequency for use in Nanaimo and wanted the commission to reject all of the other applicants on the grounds that Vancouver didn’t need another music format. They also repeatedly discussed the urgent need for CBU-AM690 to flip to FM despite being the current #2 station in terms A 12+ hours tuned. Moreover some of the evidence presented was highly suspect. In all, the CBC wants to use 3 of the last frequencies in BC, despite the fact that it already has more than 20 transmitters on the air in the region.