When I was younger and wanted to pik out outfits for myself that included, for example, sweatpants and a Rainbow Bright nightgown, my parents told me I couldn't go out dressed like that because I "would look like a Joad." I used to believe that a Joad was a regular noun and that it meant someone whose clothes didn't match. I didn't realize until 10th grade English that it was the family from the Grapes of Wrath.
A childhood belief about around the house

others believed things like this
- I fully believed, up until about 6 years old, that the word 'accident' was a noun that meant 'burnt toast'.— Karl Goetz
- I used to think that grapefruits contained grapes, and you got grapes by cutting the grapefruit open.— Grapefruit
- i thought that if i dressed in my holly hobby doll's clothes, no one would be able to find me.— pikl
- I used to believe that clothes got smaller if you didn't wear them very often.Anon
- I used to believe that my dog could speak English, but he just didn't feel like it.— Mariah
- I was shocked when I found out that dogs in foreign countries didn't know English commands.Anon