Although I was under the impression that soapies was an American word.
Let's blame Australia.
[1] I've actually been asked, once, "You're English, right?", when I was in the states.
After reading the other replies, I believe that it's not just your part of the US.
I'm going to put this down in the TIL column - I always thought it was American slang, TIL I learned that it's not.
I personally never heard it until this thread. I have heard 'soaps'.
Let's blame Australia.