moab, n. — Green’s Dictionary of Slang

moab n.

[joc. ref. to Ps.60:8, ‘Moab is my washpot’]

a turban-shaped hat, worn by women.

1864		Reader 22 Oct. n.p.: Moab, a... hat [F&H].
1864, 1867, 1870		Hotten Sl. Dict.
1873		Sl. Dict.
1884		Graphic 20 Sept. 307/2: The third, with his [...] stiff brown moab of the newest fashion [F&H].