Pat Butcher was either a fictional character on the television series EastEnders, or a woman who lived on Albert Square.
In 1993, Pat denied the Fifth Doctor, Peri and Nyssa when they tried to warn her to run from the First Rani's menagerie of the Doctor's enemies; think they were messing with her and leaving in annoyance. (TV: Dimensions in Time)
In 2009, Rani Chandra, using the Berserker pendant, commanded her father to do an impression of "Bianca off EastEnders", an impression which involved him shouting Pat's name. (TV: The Mark of the Berserker)