Meaning

noun a mechanical device that moves fluid or gas by pressure or suction

noun the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body

noun a low-cut shoe without fastenings

originThe etymology of the term is unclear and disputed. One possibility is that it comes from pomp (“ornamentation”). Another is that it refers to the sound made by the foot moving inside the shoe when dancing. The Oxford English Dictionary claims that it appeared in the 16th century, and lists its origin as "obscure". It has also been linked to the Dutch pampoesje, possibly borrowed from Javanese…

Etymology from Wiktionary, CC BY-SA 3.0