Ishwar Totapuri (also Tota Puri: Bengali: তোতাপুরী: Hindi: तोतापुरी) affectionately known as "Nangta Baba" (1780-?), born likely in Punjab, India, was a parivrajaka (wandering monk) who is said to have followed the path of the Advaita Vedanta, which is often disputed due to the meager information that exists on Totapuri.
Totapuri taught Ramakrishna that the sole reality of the impersonal Absolute could only be realized in a state of consciousness devoid of all conceptual forms. Ramakrishna described Totapuri as "a teacher of masculine strength, a sterner mien, a gnarled physique, and a virile voice", and addressed him affectionately as Nangta, the "Naked One", because as a renunciate he did not wear any clothing.
^Comans. Michael, The Question of the Importance of Samadhi in Modern and Classical Advaita Vedanta, Philosophy East & West. Volume: 43. Issue: 1. (1993) pp.33.
"The time [Ramakrishna] spent under the direction of Totapuri, who was said to be an Advaitin, was much shorter than the time spent studying Tantra, and the information available on Totapuri is very meager, so it is difficult to be sure whether he was actually an Advaitin rather than a follower of yoga."