Mumblecore
From Jenny Everywhere Wiki
The headmaster Mumblecore was the former boyfriend of Glendalf. Unlike his flamboyant, crossdressing lover and fellow wizard, Mumblecore became an assimilationist, leading to them parting ways. (PROSE: The Hermetic Garbage of Jenny Everywhere)
Behind the scenes
Mumblecore's name evokes Headmaster Dumbledore from the Harry Potter series and its spin-offs; though canonically gay, Dumbledore was never explicitly depicted as such in the original seven novels, a fact much derided following Rowling's thus rather empty reveal of his sexuality.