Auntie Jill was a character on the Creatures' 24 Hour Livestream. She was a popular character that Seamus stood up for, as a joke.
History
During the tired part of the stream, Gassy, Ze, Kootra, Lyle, Danz and Renee were playing a custom Halo 3 game. Everybody thought that Seamus fell asleep and didn't turn off Skype, but then a mysterious female voice was heard, yelling at a supposed dog and punishing it for getting white stuff all over the place. Seamus then returned later and said that he was watching some weird pornos.