Bill
Bill Cipher is a character from the animated series Gravity Falls. Similar to Link being called Zelda, he often gets called other names such as Dorito Man, Sir Triangle and Classy Illuminati by people who do not watch the show, much to many Gravity Falls fans' dismay. He has also been mistaken for cheese on occasion, among other various things.
Let it be known that he is not any kind of yellow, triangular foodstuff - he is a demon that can enter a person's subconscious, and is summoned by performing a satanic ritual.