I used to think the line, "I'm not big on social graces," in "Friends In Low Places" by Garth Brooks was actually, "I'm not big on sausage gravy."
Which I thought was nutty because my dad made excellent sausage gravy and how could anyone not like sausage gravy?
A childhood belief about misheard lyrics

others believed things like this
- I used to think gravy was made in graveyards.Anon
- when I was a kid I used to believe that the sausage factory used children— lucas
- When I first heard the song "Constant Craving" by KD Lang, I thought she was singing "God save gravy."Anon
- As a youngster, my older brother told me that polish sausage was really the bull's genitals. — Ross
- My Wifes dad used to tell her that if she ate the dark lumpy bits in the instant gravy she would die!!— Okse
- I used to beleive that liver (as in liver and onions and gravy) was rhinocerous meat.Anon