I have heard it is the extra parts of pig that they don't use in other things.
Have you ever bitten into a hot dog and felt something crunchy? Yeah, that's pigs' teeth...gross!
When I use caps I do not want you to read it like a little screech, I want you to read it like a 5,000 year old ogre with the strength of 10,000 men. — avianwings47