I have lived in the DC Metro area of the states for most of my life. Yet I have never even heard of Mumbo sauce. Apparently it has deep cultural roots in the area, and something I intend to seek out this weekend. Hell of a drive, but I don't think I can continue to consider myself a legitimate resident of the area unless I've at least tried it once.
https://en.wikipedia.org/wiki/Mumbo_sauce
If you want to check youtube for Mumbo sauce, you'll see what I mean. It looks amazing. I've just never gotten takeout in DC before. Never really spent much time there at all, really. Cities aren't my thing.