When the pinkish beef begins to sizzle, spoonfuls of flour are sprinkled on top and mixed with a wooden spoon. Cold milk and/or cream is poured ... S.O.S. stands for "Same Old Slop" or "Same ...
G.I.s call creamed chipped beef by its slang name S.O.S., but it's not used on restaurant menus. Still, plenty of local diners offer the white gravy.