"Chips or fries served with gravy. It doesn't sound like it would go together but a nice rare indulgence. "

Very popular in Australia - almost a 'standard' hotbox line, and I suspect English too.

The gravy is usually fairly salty, so it adds salt, as well as a little 'sauce' style lubrication.

A while ago here in Brisbane, a food chain started with 'New York Style' Hot Chips. Sadly, they did not last long, as the 'product', while probably very good for a snowy area, was laden with fat of various descriptions, and the extra energy was hardly needed in a sub tropical climate ... :-)