I used to believe that the lyrics to Metallica's "Sad but True" actually said "Sad Patrol" and envisioned a cop-like patrol of people set out to spread sadness.
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that beat bobbies wore big helmets so they couldnt fit into patrol cars,so they had to walk!— Tommy B
- i thought that new disney peter pan song said "spread your legs" but its really "spread your wings"— shasta
- I used to believe the Metallica song "Trapped Under Ice" said "I turned down the rice."— Erik Z.
- Actual lyrics: "I've never been your beast of burden"
My lyrics: "I've never been your big suburban"
— Big Suburban - I am Canadian and when I was little I would sing "True Pastry Love" instead of 'True Patriot Love"— Jess
- I always thought the lyrics in I'm Blue were "I could beat up a guy"— Trisha Gaurav