In Alanis Morissette's song "Ironic", I thought the first line said "An old man turned and yanked", which I figured made sense if he won the lottery. Maybe he turned and yanked on a slot machine or something?...
A childhood belief about misheard lyrics

others believed things like this
- I used to believe the Metallica song "Trapped Under Ice" said "I turned down the rice."— Erik Z.
- I used to think that when Dad turned the radio up in the car the artist was made to sing louder!!— Sparks
- That boys turned into women when they became adults and girls turned into men when they became adults. Anon
- That song that goes:
I'll never let you go...
I thought he was singing:
Another machine gun...
Haha.— Kelle - The song "Reverend Blue Jeans" turned out to be "Forever in Blue Jeans." Who would have believed that?— music lover
- The first time I saw fog, I thought the air had turned sour.— jamby