Green’s Dictionary of Slang

to run off, to decamp.

1907		Sun. Times (Perth) 31 Mar. 1/1: The amiable Frenchman and the dark Hebrew Hebe are providing plenty of prophesying for Fremantle [...] the froggy finger has now hit upon the idea of schlemozzleing to Armadale and other sylvan spots to smooge.
1925		(con. WWI) Fraser & Gibbons Soldier and Sailor Words 256: Shemozzle, To: To make off: to get out of the way.