Also 8 woolesaw, 9 oulasser. [Mosquito wulasha.] Among people of African descent in Central America, an evil spirit or demon.

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1757.  R. Hodgson, Mosquito Territ. (1822), 46. A kind of priests called Sookies, who … pretend to deal with an evil spirit called Woolesaw.

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1827.  O. W. Roberts, Voy. Centr. Amer., 267. Their great evil spirit is the ‘woolsaw’ or devil.

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1842.  T. Young, Residence on Mosquito Shore, vi. 72. After sun-set a Sambo will not venture out alone, lest the Oulasser should carry him away.

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