Something from the PR description that I had to look up to understand: "WTF" is "WebKit Template Framework".

I had to take a moment to find out why all primitives in chrome were in the WTF namespace.

WTF is just kinda funny. Seen it used in loggers too log.wtf("this should never happen")

That comment put my brain into an infinite loop for a while...

The bot consistently posts this thread on January 2nd every year (unless that date lies on the weekend). I would wait.