My friends and I would sing "Kokomo" by the Beach Boys all the time in school.
I used to think the line "that monserrat mystique" actually was "I wants a rotten steak!"
A childhood belief about misheard lyrics

others believed things like this
- I used to think Monserrat sounded like monster rat.Anon
- My mum said that when I used to sing "noahs arc" at school I would sing "who built the arc, no one, no one"— Clare
- my friends mom used to sing "you talk sense" instead of utah saints.— nikki
- I used to believe that bruises were rotten blood. — llb91
- when I was a kid, I used to believe that only girls could be my friends and all other boys were my brothers.
— rajat - I used to believe that old rotten black banana skins were dogs lips!! — T Cross. Bournemouth