Casio released a G-Shock watch with an octagonal case, the GA-2100, some people noticed that the case is vaguely similar in shape to the AP Royal Oak, a very expensive steel sports watch, which led to people calling the G-Shock the "casioak"

Now people have made steel cases for the casioak to go in (it's a very easy swap) and are calling the combination the "Royal Broke" as it really does resemble a Royal Oak from a distance but costs 2 magnitudes less