Wiktionary
n. A place enjoying very fast economic growth.
Wikipedia
A tiger economy is the economy of a country which undergoes rapid economic growth, usually accompanied by an increase in the standard of living. The term was originally used for the Four Asian Tigers ( South Korea, Taiwan, Hong Kong, and Singapore) as tigers are important in Asian symbolism, which also inspired the Tiger Cub Economies ( Indonesia, Malaysia, Thailand, and the Philippines). The Asian Tigers also inspired other economies later on; the Anatolian Tigers (certain Turkish cities) in the 1980s, the Gulf Tiger ( Dubai) in the 1990s, the Celtic Tiger ( Republic of Ireland) in 1995-2000, the Baltic tiger ( Baltic states) in 2000-2007, and the Tatra Tiger ( Slovakia) in 2002-2007.
For emerging economies in Africa, the term lion economy is used as an analogy. Countries considered to be "lion economies" are Nigeria, South Africa, Morocco, Algeria, Botswana, Egypt, Mauritius and Tunisia
The term 'wolf economy' is used to describe Mongolia's rapidly growing economy.