mizzle: run away or suddenly disappear
This word began to appear in print in the late 1700s. Although John Russell Bartlett includes it in his Dictionary of Americanisms, it was used in England as well as the United States. Mizzle could also be a noun meaning a sudden departure. It was commonly used in the expression to do a mizzle. The word seems to have fallen out of general use by the early twentieth century.
Mizzle's origin is uncertain. It may be a version of misli, a Shelti word. Shelti is a Celtic-English creole, mostly spoken by Irish travelers (gypsies) and their descendants in England and North America.