Oh, I have so many I could post about here...let's start with this one.
What I hear: He's found a dime
Actual lyric: Eastbound and down
My parents are baffled that anyone could mishear that, but I swear that is what it sounds like to me even though I know the real words and know what the song is about.
One more...sort of.
I know darn well that the lyrics to a certain song include the line "Have you ever seen the rain?" but one day I was on a long car trip with my brother in law and sister and I had fallen asleep, and woke up while that song was on the radio and could have sworn it was "Have you ever seen Lorraine?".
An emergency coffee stop was, in fact, deemed necessary and taken, when I started laughing and told them what it had sounded like for a minute.