E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A politico-religious sect of Ohio. They came from a small
German villge on the Eder. They believe all will be saved; are Quakers in plainness of dress and speech; and will neither fight, nor go to law. Both sexes are equally eligible for any office. Celibacy is the highest honour, but not imperative. They are also called Tumblers, and incorrectly Dunkers. Tunker means to dip a morsel into gravy, a sop into wine, and as they are Baptists this term has been given them; but they call themselves the harmless people. (W. Hepworth Dixon: New America, ii. 18.)