I used to be really into Johnny Horton when I was younger (probably because of that amusing alligator line in "Battle of New Orleans"). Anyways, whenever I listened to "Sink the BIsmark" (and probably cause I didn't clean out my ears as often as I should have) for about a year I heard "the world depends us" line as the "world had been so nuss". I was corrected (and probably told to do a better job of cleaning my ears) when I asked what "nuss" means.
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that if I didn't clean my ears that carrots would grow inside.— Gilian
- I used to believe that peoples ears grew so that when the world blew up we would be able to fly away.— Ears
- The line 'The dark sacred night' in What A Wonderful World is actually 'The dogs say goodnight'...— rebecca
- My uncle told me that if I didn't wash my ears when I took a bath, corn would start going out of them.— Ebod
- When I was younger, I used to believe if i covered my ears before I farted no one else would hear it.— Lime
- I used to think that New Orleans was in Los Angeles, because I'd seen addresses written "New Orleans, LA".— Hilary