At McDonald's

My friend:hi can I have some chicken nuggets?
Cashier:you mean mcnuggets?
Me:uhm... What's the difference?
Cashier:mcdonalds has mcnuggets.. Duh.
My friend:That's very interesting. Thanks for wasting my time, now can you mcfinish taking my mcorder, mcmake my food and mcshut thefuck up? Thanks a lot mcasshole.
Me:and some mcfries with that please.