1 definition by Sauce Specialist WD-40

The sauce that comes from out of one's back. Typically from a pimple, cyst or magical portal, back sauce is potent, thick, creamy and extremely rare in small communities. It is more common in metropolitan areas. People with back sauce build-up are, on average, stupid and have hair on their heads. They are hard to spot. Beware of the "back saucers". They are aggressive and very agitated due to the back sauce build-up. Avoid eye contact and any form of communication with a back saucer.
Ariana Grande: "Man, I have a serious build-up of back sauce, Tony. I think I'm gonna have to go to the spa and get a massage so they can squeeze some of that creamy juice out."

Tony the Tiger: "Bitch, I have no idea what you're talking about. That shit sounds disgusting."
by Sauce Specialist WD-40 November 1, 2019
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