I believed that the words to 'White Flag' by Dido were "I will go down with this shit, I won't poke my eyes out and surrender. There will be no1 left but my duck" When the actual words were: "I will go down with this ship, I won't poke my hands up and surrender, there will be no white flag above my door". How embarrassing!
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that a football ref's flag was a banana peel.Anon
- I used to believe New Zealand and Australia were part of the UK because they have a UK flag on their flags — H
- when I was a kid my neighbor told me if I picked my nose I would poke out my eye. I believe him. — Jane
- my mom told not to pick my nose because if i fell i would poke my brain.— brent
- I used to believe that, in a deep and profound kind of way, the words "door knob" rhymed with "said so". — Katie
- I used to think that the song "Just like white winged dove" by Stevie Nicks was "Just like the white window" — Julia