j_baker called it sarcasm. More generally, "could care less" is an idiom. It has a figurative meaning that is different from its literal meaning. Here's a link

j_baker called it sarcasm. More generally, "could care less" is an idiom. It has a figurative meaning that is different from its literal meaning. Here's a link to "could care less" in The American Heritage Dictionary of Idioms, http://books.google.com/books?id=9re1vfFh04sC&pg=PA137&dq=idiom+dictionary+%22could+care+less%22&hl=en&sa=X&ei=QaGuT-eUJuKaiQLTw8j9Aw&ved=0CDgQ6AEwAA#v=onepage&q=idiom%20dictionary%20%22could%20care%20less%22&f=false http://books.google.com/books?id=9re1vfFh04sC&pg=PA137&#...