Mary Schirmer
From SquackleWiki
Mary Schirmer is the mother of Burger King the Janitor.
Her husband-to-be is Giles Schirmer.
Her son Burger King the Janitor calls her “Momma.”
Her head was chopped off by an invisible man named Joe Cortes.
Relevant articles:
http://squackle.com/6773/stories/the-janitors-great-adventure/
