A term coined by Trungpa Rinpoche, a realized master of the Kagyu and Nyingma lineages of Tibetan Vajrayana Buddhism. Maha Ati means Great Ati, Ati yoga yana is the last and most supreme yana or vehicle of the Nyingma lineage. Trungpa Rinpoche used the term Maha Ati to bridge the Ati yoga yana of the Nyingma and the Mahamudra tradition of the Sarma (New) schools, of which the Kagyu lineage is considered a part of.