Saline breast implants. Refers to creases in the saline bags which you can actually see on the surface of a woman's breast. Usually seen when a woman is bending over or in any non-vertical position - you'll see lines or creases running along the sides of the breasts (imagine a zip-lock sandwich baggie filled with water). Typically seen as a sign of a low budget breast augmentation procedure, as well as the inferior nature of saline breast implants when compared to silcone.
Dude, that chick at the beach was pretty hot but she had full on crinkle cones.