The Big Mac is one of the famed burgers supplied by Macdonald's throughout the world and one of their signature dishes. It consists of a beef patty or burger (the size will differ depending on the country), a Big Mac bun, pasteurised processed American cheese, Big Mac sauce (ah-ha! Top secret), lettuce, sliced gherkins (US: dill pickles) (US: pickles), dehydrated onions and seasoning.

Pulp Fiction made an interesting contribution to the discussions about Macdonald's in France.
Vincent: ..In Paris, you can buy beer at MacDonald's. Also, you know what they call a Quarter Pounder with Cheese in Paris?
Jules: They don't call it a Quarter Pounder with Cheese?
Vincent: No, they got the metric system there, they wouldn't know what the f*** a Quarter Pounder is.
Jules: What'd they call it?
Vincent: Royale with Cheese.
Jules: (repeating) Royale with Cheese. What'd they call a Big Mac?
Vincent: Big Mac's a Big Mac, but they call it Le Big Mac.
Jules: What do they call a Whopper?
Vincent: I dunno, I didn't go into a Burger King. But you know what they put on french fries in Holland instead of ketchup?
Jules: What?
Vincent: Mayonnaise.