A way to describe something that is more moronic then just regular moron. When the word moron is simply insufficient to describe just how idiotic something is.
Jackie: Could he BE any more of an idiot?
Jen: Moron Sauce!
Sauce is used to describe someone who has a style, confidence and attraction about them. Usually someone who is well-dressed, fashionable, and has an aura about them. swagger style
"OMG Becky, look how fly that dude is. He's got sauce."