The Shakers, also known as the United Society of Believers in Christ's Second Appearing, have many synonyms referring to their religious practices and beliefs. These include the Shaking Quakers, the Shaking Friends, and the Holy Rollers. The term Shaker is derived from the unique shaking or trembling movements that the group experiences during their worship services. Other synonyms such as the Simple Gifts sect and the Millennial Church emphasize their ascetic lifestyle and their belief in the imminent second coming of Christ. Regardless of their name or label, the Shakers' legacy continues to influence American culture and spirituality through their iconic furniture design and their contributions to social justice and equality movements.