Anglo-Saxon Elitist. Someone who is from or is descended of Anglo-Saxon heritage and looks at everything in the world from the white point of view first if not always. For example, when watching the movie Avatar, if one cannot detect the Africanness of the Nav'i people on the planet Pandora, let alone the overt and striking similarity of the story line to that of many popular movies detailing culture clashes from the past (Pocahontas, Apocalypse Now, etc) then you're probably an ASE.
John couldn't see how much of an ASE he was being. The blues didn't come from England, and rock and roll was clearly NOT invented by white people. Rhythm and Blues music was picked up by the British Rock bands (The ROLLING STONES, Beatles, etc) who listened to Muddy Waters and Howlin Wolf and other African American blues musicians and made the genre popular with the young generation of the late fifties and early sixties.
Saying Eminem is the greatest rapper ever can be seen in a certain light as a very ASE position to take: Especially if your choice for runner up is Vanilla Ice.