We detached this subthread from https://news.ycombinator.com/item?id=14577888 and marked it off-topic.

It's hacker news jargon, with an etymology something like RTFM (read the fricking manual) -> RTFA (read the fricking article) -> TFA (the fricking article), used as shorthand for "the article."

The Fine Article.

Or something more colorful if used in anger.

The Featured Article.