Lard is pork fat commonly used in pie crusts, deep frying, and traditional Mexican Food.
Lard is made by rendering pig fat and can be gotten from any part of the pig as long as it is high in fat content. The grade of the lard is based on where on the pig the lard came from.
Lard is used less commonly today compared to what it used to be do to health concerns and the fact that vegetable oil is more readily available.