Communist Revolutionary and "Chairman" of the People's Republic of China from 1949-1976. Responsible for the deaths of anywhere between 20 to 80 million people, depending on who you talk to. Most of these deaths are attributed to "The Great Leap Forward", a economic plan that proved disastorous and led to a horrible famine. The crowd Mao surrounded himself, in particular his third wife, didn't help matters much.
1. n. Vile, evil ruler of China from the end of WWII to the early 1970's. Killed millions of his own people with forced collectivization of agriculture, the "Great Leap Forward," and most of all with the power-restoration maneuver resulting from the famine created by Great Leap Forward known as the "Cultural Revolution." Faclitated a transfer of power to a group of even more evil people called the Gang of Four that included his wife. The tyrant can be considered on equal footing with the next definition.
2. n. The excrement of Microtus pennsylvanicus. You guessed it, its "mousie dung."
An example of Mao Tse-Tung's thinking can be taken from his book, "The Wit and Wisdom of Chairman Mao," where he writes, "Politics comes out of the barrel of a gun."