In Otherside by the Red Hot Chili Peppers, I could've sworn they sang "the ostrich is full and its spilling my guts."
The real line is "the ashtray is full and I'm spilling my guts". Oops.
A childhood belief about misheard lyrics

others believed things like this
- When I was little I use to think hot dogs were pig guts.— Tri 5460
- i used to believe that if you didnt fart that you would throw your guts upAnon
- My brother used to tell me that the squidgy bits in mushroom soup were owl guts!— Kirsten
- The moon is full of wotsits.Anon
- I used to believe that the full moon was God's flashlight.Anon
- when i was a child,i used to believe that a "million" is a big bag full of coins— Kafka