When I moved up to middle school from juniors, I was reliably informed by the older kids that the Cornish pasties served in the dinner hall were filled with dog food. I never tried one until I was about 20.
A childhood belief about nasty food

others believed things like this
- My mom was always talking about "making
ends meat" but I don't ever remember having it served at dinner!— John Stees - I used to believe that as I ate food, I filled up, and that once I filled up completely, I would die. Anon
- i used to think that mcdonalds served ballons..(the sign said billions and billions served)Anon
- We were told at school by the evil dinner ladies that apple pips contained arsenic.....Anon
- When I was in elementary school, I believed my heart moved across my chest throughout the day.— Allison
- I used to believe that the grated cheese served to cool the dough.— Silvia Spinetti