Kirat Mundhum (also Kirati Mundhum), also called Kiratism or Kirantism or simply Mundum, is the religion of the Kirat: Limbu, Rai, Sunuwar and Yakkha peoples of Nepal, India, Myanmar and now practiced in the UK, China, USA and many other countries. The practice is also known as Kirat Veda,Kirat-Ko Veda or Kirat Ko Ved. According to some scholars, such as Tom Woodhatch, it is a blend of animism (e.g., ancestor worshiping of Sumnima/Paruhang and Yuma Sammang/Tagera Ningwaphumang),Saivism, and Tibetan Buddhism. It is practiced by about 3.1% of the Nepali population. Before it was recognized as a religion on the Nepali census, 36% of the Kirati population claimed to follow the Kirat religion, but when it was recognized this figure increased to 73.9%, a 157% increase in the Nepali Kiratis.
The Limbu people have their own distinct form of Kirat Mundhum, known as Yuma Sammang or Yumaism; they venerate a supreme goddess called Tagera Ningwaphumang .
In addition to the Ancestral worshiping Kiranti people also worship the Mother Nature, to which some people, especially in the western countries are also commonly known as Earth Worshiping.
Mundhum is the religious scripture and folk literature of the Kirat people of Nepal, central to Kirat Mundhum. All four Kirats (Limbu, Rai, Sunuwar and Yakkha) have slightly different Mundhum. Mundhum means "the power of great strength" in the Kirati language. The Mundhum covers many aspects of the Kirat culture, customs and traditions that existed before Vedic civilisation in South Asia.