[theandrewbailey]

There's a Fat Man's Misery passage in Mammoth Cave. I would imagine there's a lot of places named that.

https://www.nps.gov/places/fat-man-s-misery-beneath-your-fee...

[kolektiv]

There's a lovely walk in the UK around Lingmoor Fell which has a famous narrow squeeze between a rock and a cliff face called Fat Man's Agony. There's a good photo about half way down this blog post: https://www.walkmyworld.com/posts/lingmoor-fell-side-pike