McIncest
An unbelievable sandwich created by students of the Pine Plains FFA Chapter at the McDonald's in Catskill, NY. It consists of a McGangBang inside a Big Mac. The sandwich itself is so tall it is almost impossible to take a bite of all layers at once.
Employee: Hello, welcome to McDonald's. May I take your order?

Customer: Hi, can I get a Big Mac and a McGangBang?

Employee:...What?!?

Customer: Can I just have a Big Mac, a McDouble, and a McChicken?

*Customer goes to table and makes the McGangBang, then they split the Big Mac and insert the McGangBang.*

This is how the McIncest is born.