This end is called the thagomizer... after the late Thag Simmons

I love this.

When the Far Side came out in 1982, paleontologists realised they'd never actually named that part of a stegosaurus and began using the term informally. And now, 36 years later, if you type "Thagomizer" into a search engine... pic.twitter.com/pMDYoOrT8d

— Jim Bliss (@JimBliss23) July 21, 2018