Bad one as well... show name for a barrel horse...
sofa king fast
(you have to say it outloud to see why it's bad... LOL)
I know it's bad but I think this one is funny.
I don't know about show names, but my sister-in-law's horse was named "Yeltsin" when she bought him. The reason was because he was supposed to be a paint, and came out solid colored. They said "Since Boris Yeltsin was a failure as a president, and this horse is a failure because he he isn't a paint, we decided to name him Yeltsin." My sis-in-law promptly changed his name.