What is "zavaidoc"

Marin Teodorescu (March 8, 1896, Pitesti – January 13, 1945, Bucharest), known as Zavaidoc, was a Romanian singer, the country's best known lăutar in the interwar period. Born in Pitești into a family of lăutari, he made his way to Bucharest as a youth, together with his taraf partner. He released his first disc with Columbia Records in 1925, meeting with instant success. He died two decades later and was buried at Cernica.