A case of traveler's diarrhea that one gets during a trip to the China, specifically the People's Republic of China. Takes it's name from Chiang Kai-Shek, the leader of Nationalist China, who was overthrown by the Chinese Communist under Mao Zedong in 1949.
Bob: Hey, where's Jim? We were supposed to go see the Great Wall Today.
Mary: He came down with a case of Chiang Kai-Shek's Revenge