I have one that I have zero idea what it actually was.
In an 1851 Scotland census, Stonehouse, Kincardineshire-born Peter Chapman (20), was enumerated as being employed in Stayslop Mannfacture*.
* This is how it was spelt. I have no idea what this occupation was. It has no relationship to anything similarly named in the 2020s. (Obviously the "Mannfacture" should be "manufacture".)
I saw the image. I figured whoever wrote it had no idea, so just wrote down what they thought they heard.
A 13 year old winkler Frederick James Osborne
Coprolite mining (digging up fosilised 'dinosaur' dung).