An affectionate name for your female acquaintance when she is in a good mood. Referencing the day of the week, Friday, which is, by school children and business people, known as the start of a weekend; thus Friday would reference a start to something positive.
My girl Friday and I went to the movies last weekend and she was pretty psyched to see that new "Snakes on a Plane."
by MyGirlFriday August 21, 2006