Mumbo sauce or mambo sauce is a condiment developed and popularized in washington, dc take-out restaurants. the red-orange sauce is similar to barbecue sauce, but somewhat sweeter, and also somewhat spicier or more sour. (there is some variation in flavor and consistency.) it is put onto fried chicken wings, french fries, fried jumbo shrimp, and fried rice. the origin and ingredients of mumbo sauce are subject to great dispute. it is often compared to chicago mild sauce, found at take-out restaurants in that city’s predominantly black neighborhoods.

Source: Wikipedia