Oh, I was referring to how In'n'Out will slice a whole onion (in concentric rings, still attached) and put that on your burger, while McD's uses diced onions sprinkled over the top. Used an unfortunate phrase to describe it, because onion rings are also a real side dish (which I don't associate with any fast food joints - more like clam shacks and stuff). Maybe that makes it a bad example anyway, if nobody knows what I'm talking about.