In the UK the word prick is (one of many) slang terms for penis, I never realised it wasn't used in the US.

Oh, it's used that way in the US, too. It's in common enough usage here in that form so that the double meaning isn't lost on us.

what Rush era are you likening Prick to here, my enthusiasm faded on their later albums

<dons flame suit>

Oh boy, another "they peaked at 2112" fan...