A period in which an adult man disguises himself as a woman in order to secretly spend time with his children.
Not to be confused with a Tootsie weekend in which a man assumes a female identity for a short period to determine whether or not he would enjoy being a woman.
A: Your ex-wife has sole custody of the kids?
B: Yeah, but I get to see them on Doubtfire holidays.
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.
That vag was so good I had to pull out and say "Hello" by pulling a Mrs. Doubtfire.