OK, I'll admit this isn't a lyric mondegreen, but it still fits the category. And it cracked me up.

I was watching TV this afternoon when a commercial came on for a local video rental business. They showed VCR/DVD covers of various popular films as the announcer rattled off such genres as "Classic movies," "action flics," "porn films," "animated features," ... .

Whoa!!   Did the announcer really say "porn films"!!?

I was sitting there in astonishment, scratching my head trying to make sense of something I found rather incomprehensible for a local, mid-afternoon, broadcast TV ad. Could I have possibly mis-heard that category? The images of the DVD/VCR cases were small and quickly passed from the screen, so I couldn't see what movies they were showing as examples of "porn films."

If you're not quicker on the take than I am and haven't figured out my "mondegreen" by now, my strong hunch is that the3 announcer actually said "foreign films."

That makes more sense, don't ya think? §;-D