When I was a kid my eldest sister used to be mad on the Bay City Rollers and was always playing one particular song called Shang-a-Lang, the thing is I used to call it the rude song because all the kids at school used to sing Shag_a_Lad and I really believed this was the title of the actual song.
A childhood belief about misheard lyrics

others believed things like this
- I thought the song "Karma Police" was actually saying "call the police" before I learned the title— Alberto Richardson
- When I first heard the song "Constant Craving" by KD Lang, I thought she was singing "God save gravy."Anon
- I used to think that the title of Barry Manilow's song "Looks Like We Made It" was "Looks Like Tomatoes".— close2nd
- I thought the song "Party Time" by Moby was actually saying "heart attack" (this was before I knew the title)— Elviessa
- When I first heard Bruce Springsteen's song, "Born in the USA," I thought that the song was "Porn in the USA"Anon
- i thaught the michael jackson song billy jean song said Janet's not my son Anon