There's a song by Wir Sind Helden called Denkmal. It was on radio three years ago a lot. There's a line which I believed to be "Hol den Fahrschein raus" (Take out your ticket for showing it to the ticket inspectors) .. since the song seemed to be about youth culture, graffiti and someone else having conducted illegal or at least public nuisance, it made sense to me perfectly. Until I re-heared the song in full. The line actually is "Hol den Vorschlaghammer (Fedge the sledge).
A childhood belief about misheard lyrics

others believed things like this
- The Beatles song "Ticket to Ride" always came out "She's got a tick in her eye."— Kurt
- Until i was about 6, i used to believe that when the police gave you a ticket, it was a ticket to the movies!— mari
- I used to think that the song"Stayin Alive" said "Staying In Line" like at school when I was little. — MacKenzie
- I used to think that the line in the song "Life in the Fast Lane" was "Fights in the Bat Plane".Anon
- i thought the line "saving my face" from the KT Tunstall song of the same name was "shaving my face"Anon
- I thought the line in the song "more than a woman" was "four-legged woman".— boo