IHOP became IHOb on Monday, in a drawn out and temporary name change where the "P" flipped and became a "b." The former House of Pancakes is now the International House of Burgers because you maybe didn't know they serve burgers.
The name change has been all over, so people definitely know IHOb serve burgers. (And some people discovered the "P" in IHOP stood for pancakes along the way.) However, the name change has also become fuel for the endless joke and meme machine on Twitter.