My mother believed for many years that in "Bohemian Rapsody" the line "spare him his life from this monstrosity" was "spare him his life for his one sausagey". She also thoust that "Beelzebub has a devil put aside for me" was "Beelzebub has a devil for a side-board-ee".
A childhood belief about misheard lyrics

others believed things like this
- In Queen's Bohemian Rhapsody, I used to think they were singing "Beelzebub has a devil for a sideboard!"Anon
- I used to believe that santa had a spare key to our house because we had no chimney.— Karl Andrade (Bombay, India)
- I believed if I prayed for the Devil, he would start being good for God. — Jackie
- I believed that if I looked too long in the mirror admiring myself the Devil would appear.— Paul Elletson
- I used to believe that the last line of Row Row Row Your Boat was 'Life is butter dream'.— Mindless Misfit
- I used to think that the line in the song "Life in the Fast Lane" was "Fights in the Bat Plane".Anon