The Bhut jolokia, also known as ghost pepper, ghost chili, U-morok, red naga, naga jolokia andghost jolokia, is an interspecific hybrid chili pepper cultivated in the Indianstates of Arunachal Pradesh, Assam, Nagaland and Manipur.

In 2007, Guinness World Records certified that the Ghost pepper was the world's hottest chili pepper, 400 times hotter than Tabasco sauce. The Ghost chili is rated at more than 1 million Scoville heat units (SHUs). However, the ghost chili was shortly superseded by the Infinity chili in 2011, followed by the Naga Viper, the Trinidad moruga scorpion in 2012, and the Carolina Reaper on August 7, 2013.

Bhut jolokia is used as a food and a spice, as well as a remedy to summer heat. It is used in both fresh and dried forms, to "heat up" curries, pickles and chutneys. It is popularly used in combination with pork or dried or fermented fish. In northeastern India, the peppers are smeared on fences or incorporated in smoke bombs as a safety precaution to keep wild elephants at a distance. The pepper's intense heat makes it a fixture in competitive chili pepper eating.

R. B. Srivastava, the director of the Life Sciences Department at the New Delhi headquarters of India's Defense Research and Development Organisation (who also led a defense research laboratory in Assam), said bhut jolokia-based aerosol sprays could be used as a "safety device", and "civil variants" of chili grenades could be used to control and disperse mobs.

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