DeRuoshbag Share definition Flag Dr. DeRuosi; The act of being or behaving like Dr. DeRuosi, while simultaneously being a complete douchebag. Did you see that DeRuoshbag make an ass out of himself if front of the entire junior/senior class? DeRuoshbag by RHS student representative March 7, 2004 0 0 Get merch Get the DeRuoshbag mug. Buy Now — $32.95 See more merch