Used to derisively describe a girlfriend primarily being used for sex. Usually someone will have several dipping sauces in a series or perhaps at the same time.
(noun) Rooted in the verb "dip" (meaning to depart), dip sauce is an emergency reserve of speed that must be tapped when one is running desperately late for something. It is most effective when used as part of the imperative expression "harvestthe dip sauce."
Andrew: Oh, crap, the movie starts in three minutes and we're still ten blocks out!
Remy: Harvest the dip sauce, son!