What does Biliary sludge mean?

Biliary sludge meaning in Medical Dictionary

an assortment of microscopic particulate matter in bile occurring when particles of material precipitate from bile. Bile may be the fluid that is made by the liver. Its kept in the gallbladder until after a meal, when it passes out of the gallbladder and through common bile duct into the bowel to aid eat up fat into the dinner.