1) A powder substance that is mixed with water. When said substance is mixed with water, a tasty, salty new substance is formed. You can dip solid foods into the new substance to enhance the flavor of the solid food. Suggested solid foods: ham sandwich, carrot, strawberry, dead babies
2) An exclamation of frustration towards a Jewish person.
1) Oh man, my dead baby tastes much better when I dip it in this au jus!
2) Au jus! Why are you such a better accountant than me?
The water-like substance that provides lubrication for stools, also known as bile. Sometimes this substance can be omitted during flatulence causing irremovealble stains on undergarments.
Betty strained herself when passing gas, as she was shocked to find poop au jus in her panties.