What is "trailanga"

Trailanga Swami (also Tailang Swami, Telang Swami) (reportedly 1607 – 1887) was a Hindu yogi and mystic famed for his spiritual powers who lived in Varanasi, India. He is regarded as a legendary figure in Bengal, with stories told of his yogic powers and longevity. According to some accounts, Trailanga Swami lived to be 280 years old, residing at Varanasi between 1737-1887. He is regarded by devotees as an incarnation of Shiva. Ramakrishna referred to him as the "The walking Shiva of Varanasi".