I can't find an open 'being British' thread anywhere, so thought I'd ask here.

I've heard that in Britain police officers can be referred to as pigs. Is it old-fashioned or is it still used? And if so, can police station be a piggery?

I browsed Urban Dictionary online and it was inconclusive. I know that at some point piggery was a police station, but would an averaba British person understand if Draco Malfoy used a phrase, "one of the Thickest Bigs of the Wizarding Piggeries"?

If the answer to all of the questions is no, can anyone tell me what could Malfoy call that cop? Thanks.