Have you ordered off the McDonald's secret menu?
They revealed: "You can order from the 'Secret Menu'. Just like with any of our sandwiches, you can add, remove or change ingredients by special request. These are called 'grill orders'."
So what does this mean? Well, instead of ordering a Big Mac through habit, you can get stuck into a number of these other things, featured below. The staff might not know them by name, but you can certainly ask them to assemble them for you.
The Monster Mac
A Big Mac for the greedy - eight beef patties on one thing!
The Neapolitan Shake
If you ask, you can have all three flavours of McDonald's milkshakes in one cup.
The Land, Sea and Air
Add a Fillet-o-Fish to a Big Mac, and then stick a chicken burger in it as well. It is a Noah's Ark of meals!
You can get a McChicken sandwich placed inside a double cheeseburger. Dreadful name, mind you.
Big Mac Sauce Fries
Get some fries and then ask them to put some of that special Big Mac sauce with them, instead of tomato sauce. If you prefer, you can try and make your own Big Mac sauce, like we told you to ages ago.
The Marty McFry
Combine a Big Mac with a a McChicken sandwich. Stick a load of fries in it as well, if you're feeling brave.
The Reddit AMA is here, if you're interested about the ins-and-outs of a McDonalds.