Write a description of the curse on Stanley’s family from Holes.

Stanley Yelnats comes from a family that believes they were cursed by an ancestor’s actions. This ancestor’s name was Elya Yelnats, but the family refers to him as Stanley's "no-good-dirty-rotten-pig-stealing-great-great-grandfather" (chapter 1). Elya’s infraction was stealing a pig from a one-legged gypsy, who then called down the curse on the whole family.
The pig was part of a marriage negotiation that Elya was conducting in his native Lithuania; he needed a pig to compete with his rival in offering Myra’s father an appropriate gift. He sought the help of Madame Zeroni, but he failed to uphold his bargain when he left for America.
Although several generations later and the family members do not really believe in the curse, they refer to it whenever bad luck befalls a family member, as frequently occurs.