The term 'Infamous Spanish Collar' refers to the practice of garroting, a form of execution used in Spain during the 19th and 20th centuries. The term is derived from the Spanish word 'GARROTE', which is a device consisting of a wooden or metal pole with a loop of rope or wire at one end, used to strangle a person. This method of execution was considered particularly cruel and was abolished in Spain in 1978.