my little brother thought that the words to "everything's coming up roses" were "everything's coming, copruses!" he would run around the house singing it, and it was hysterical.
A childhood belief about misheard lyrics

others believed things like this
- I used to believe the T.V show "War of the Worlds" was for real, that those aliens were REALLY coming for us. — Adelaida
- I used to think that the smoke coming from the factories were actually making clouds Anon
- I used to think when I peed in the shower as a kid, the water coming back through the showerhead was my pee.— gregg
- I used to think that lave lamps were the devil coming out of them trying to steel my soul. until i was like 10— Bianca
- I used to believe that echos were actually the sound going completely around the world and coming back to you.— kyle
- I used to believe that the exhaust fumes coming from a car were actually what pushed it forward like a rocket — rocket car