Packwalker
A human who walks so far they might as well be a dog with no leash and no brains.
My cousin is a Packwalker. He walked to the store and back just to prove he could.
I told my mom I was going for a walk. She said, 'Don't be a Packwalker.'
He walked to the park, then the grocery store, then back home. I don't know why he's still alive.