Degraissage is a cooking term - the removal of fat from a broth or a sauce . If the liquid to be cleared of fat is put into the refrigerator and left until the fat sets, it is much easier to remove it by lifting it up with a palette knife. The fat removed from stock , the pot-au-feu , etc is called Degraissis which can be clarified and used for frying. Degraissage is the French word for "degreasing". My mother used to "Degraissage" by putting the broth she prepared into the refrigerator and allow it to set, it is much easier for her to do this than to remove the fat little by little while the broth is still cooking. She usually did this procedure when she cook Nilagang Baka (boiled beef).
List of books: Degraissage