Chöd (Sanskrit: ccheda-sadhana, Tibetan: gChod sgrub thabs) is a spiritual practice primarily found in Tibetan Buddhism. Also known as "Cutting Through the Ego"[1], the practice is based on the philosophy of the Prajnaparamita sutra (see also the Diamond Cutter Sutra), combining its philosophy with specific meditation methods, application to the practitioner's daily activities and a tantric ritual.
More info: http://www.bodhicitta.net/Chod.htm

A Chöd sadhana text available online: http://www.zangthal.co.uk/files.html (the fifth text or find "Chöd": sorry, inline linking disabled)