Great Satan
The Great Satan (Persian شيطان بزرگ Shaytân-e Bozorg) is a derogatory epithet for the United States of America in some Iranian foreign policy statements. Occasionally, these words have also been used toward the government of the United Kingdom.
The term was originally used by Iranian leader Ruhollah Khomeini in his speech on November 5, 1979 to describe the United States whom he accused of imperialism and the sponsoring of corruption throughout the world.
Ayatollah Khomeini also occasionally used the term "Iblis" (the primary devil in Islam) to refer to the United States and other Western countries.
Background
The post-revolution government of Iran has considered the United States and the United Kingdom as Imperialist states, who have a long history of interfering in Iran's internal affairs. In 1907, the Anglo-Russian Agreement between Russia and Britain divided Iran into spheres of influence, questioning although not terminating Iranian sovereignty. At the height of the Cold War, the administration of the U.S. President Dwight D. Eisenhower approved a joint Anglo-American operation to overthrow the elected prime minister, Mohammad Mossadeq, in the pretext that his nationalist aspirations would lead to an eventual communist takeover. The operation was code-named Operation Ajax. At first, the military coup seemed to fail, and Shah Mohammed Reza Pahlavi fled the country. After widespread rioting and with help from the CIA and British intelligence services, Mossadeq was defeated and the Shah returned to power, ensuring support for Western oil interests and snuffing the perceived threat of communist expansion. General Fazlollah Zahedi, who led the military coup, became prime minister.