Wikipedia
Mahāmudrā ( Sanskrit, Tibetan: Chagchen, Wylie: phyag chen, contraction of Chagya Chenpo, Wylie: phyag rgya chen po) literally means "great seal" or "great symbol." It "is a multivalent term of great importance in later Indian Buddhism and Tibetan Buddhism" which "also occurs occasionally in Hindu and East Asian Buddhist esotericism."
The name refers to a body of teachings representing the culmination of all the practices of the Sarma schools of Tibetan Buddhism, who believe it to be the quintessential message of all of their sacred texts. The mudra portion denotes that in an adept's experience of reality, each phenomenon appears vividly, and the maha portion refers to the fact that it is beyond concept, imagination, and projection.
Mahamudra is a Trance/electronic project based in the south of Israel. Members are: Ran Malka(1979), Eyal Cohen(1977) and Sagiv Ben-Giat(1982). They have released several tracks on different compilations and their debut album "reality is just a myth" released on 20 February 2007 in "Utopia Records". Their live act includes electric guitar(Yotam Peretz), vocals(Yonit Tzarfati) drums and percussion(Gili Aizenman) and of course keyboard/synth and live effects. With the release of their first album they are already marked as the rising star of the Trance scene.
Mahamudra is a hatha yoga gesture ( mudra) whose purpose is to improve control over the sexual potential. The sexual potential, associated with apana, is essential in the process of awakening of the dormant spiritual energy ( Kundalini) and attaining of spiritual powers ( siddhi).