Three pigs
The sentence comes from children story "Three bigs"
Not by the hair of my chinny chin chin , the little pig squealed
What does it mean ?

Question

Answer

Wow. I've never had to think about this.

Basically, it means "not even by the tiniest possibility". Like a hair on the piggy's chin.

If you're wondering about "chinny chin chin", it's for rhythm.

Little pig, little pig, let me come in!
Not by the hair on my chinny chin chin!
Then I'll huff and I'll puff and I'll blow your house in!

Answer

By the beard of Zeus!

Answer

Actually, men used to make oaths and swear by their beard.