What's the etymology of "chat" as in "chat potato"?
Apparently "chat potato" refers to small potatoes suitable for swine food.
Regarding the origin, Some sites online list it as "origin unknown" or similar. Is that true?
Here is an example reference to this term on the web: "Chat or baby potatoes are ideal for roasting, steaming or boiling and are often served whole with their skins on." From https://www.taste.com.au/healthy/articles/chat-potatoes-2/bxr6vu7m
Many/most references I can find seem to be Australian sites.