If you say that someone is like a dervish, you mean that they are turning round and round, waving their arms about, or working very quickly. Brian was whirling like a dervish, slapping at the mosquitoes and moaning. a member of a Muslim religious group, some of whom dance fast and spin around as part of a religious ceremony (dervis ). In Islam, a member of a Sufi fraternity. These mystics stressed emotional aspects of devotion through ecstatic trances, dancing, and whirling. Dervishes can be either resident in the community or lay members; wandering or mendicant dervishes are called fakirs and are often regarded as holy men who possess miraculous powers. Though viewed as unorthodox and extreme by most Muslims, the movement has endured to the present. See also Sufism
A dervish is a member of a Muslim religious group which has a very active and lively dance as part of its worship