Neo-sannyas is kind of like playing dress-up but for grown-ups who want to explore spirituality. It started in the 1970s when a man named Bhagwan Shree Rajneesh started a new kind of religion that mixed together ideas from Hinduism, Buddhism, and Western philosophy.
In this religion, people would become "neo-sannyasins" by wearing bright orange or maroon robes and giving up a lot of things that they thought were unnecessary or distracting, like TV or makeup. They would also meditate a lot and follow some rules like not eating meat or drinking alcohol.
But being a neo-sannyasin didn't mean you had to live in a monastery or give up all your worldly possessions. You could still work, have a family, and live a relatively normal life. The idea was to be more mindful and focused on spiritual growth while still living in the modern world.
Today, there are still people who identify as neo-sannyasins and follow the teachings of Bhagwan Shree Rajneesh, who later changed his name to Osho. They may still wear orange or maroon robes and practice meditation, or they may just incorporate some of the spiritual concepts into their daily life.