No. He just discovered false slang that seemed plausible. It's Justin Bailey for the Xbox Generation.

For reference, someone discovered that the Metroid code JUSTIN BAILEY ------ ------ would allow you to play without armour; Samus would then run around in something that looked like a a one-piece. Even though this was just random, there was a theory that "just in bailey" was Australian slang for "wearing only a swimsuit." That theory turned out to be false.

"Arrow in the knee" has recently been subjected to similar theory.

There's nothing profound about it.