Weak Sauce Share definition Flag A nice way of saying "fuckin A" or "thats shitty" or after finding out bad information weak sauce is used. Kinda derived from Weak-ness "Weak Sauce! This Sulfer guy keeps fragging me left and right." Weak Sauce by 0v3rkyll August 26, 2007 0 0 Get merch Get the Weak Sauce mug. Buy Now — $32.95 See more merch