I used to think that when people were talking about the "Abominal Snowman" (more correctly known as the Yeti), they were saying "Invulnerable Snowman".
A childhood belief about monsters

others believed things like this
- I used to believe I could grow up to be a snowman.Anon
- When I was little, I thought he was called the "Abdominal Snowman" instead of "Abominable."Anon
- Brown or otherwise non-white snow was snowman poop. My kids believe it too!— Dellio
- I used to believe the people of television were talking to me alone !— Margaux, a French student in eighth grade
- That people older than me knew what they were talking about.— Mark
- When I was younger - I used to believe my stomach rumbling was little people in there talking to me.Anon