Al: Now that we've weeded out another traitor from the ranks, let's see if there are anymore Mrs. Doubtfires in here!
(pulls on the hair of a powerfully built woman and is surprised to discover it really is a woman)
Al: Hey! You're a woman!
The act of ejaculating on woman's face, then proceeding to spread it to form a sort of mask, then shouting "Hello!" in a british like accent as pronounced in the move.
A man that dresses like a woman. It is a reference to the film with the same name starring Robin Williams.
Woman: "Hello. I'm Mrs. Pennyfeather. I understand you're looking for a nanny."
Marge: "Pleased to meet you."
Homer: "Wait a minute Marge. I saw Mrs. Doubtfire. This is a man in drag!"