Oh, this is fun. Two of my favorite things in one awesome title.
Okay, we, lamentably, aren't talking about food (the most perfect food) but we are actually talking about navigation on a website. You've seen it around… usually you'll see this menu structure in mobile views of your website but we are starting to see this more and more often in desktop views as well.
The real question is, "Do people know what these really are?"