Cārvāka (Sanskrit: चार्वाक), also known as Lokāyata, is a system of Indian philosophy that assumes various forms of philosophical skepticism and religious indifference.^[1]It is named after its founder, Cārvāka, author of the Bārhaspatya-sūtras.^[2]

In overviews of Indian philosophy, Cārvāka is classified as a "faithless" (nāstika) system, the same classification as is given to Buddhism and Jainism.^[3][4] It is characterized as a materialistic and atheistic school of thought. While this branch of Indian philosophy is not considered to be part of the six orthodox schools of Hindu philosophy, it is noteworthy as evidence of a materialistic movement within Hinduism.^[5][6]

http://en.wikipedia.org/wiki/Lokayata