Green’s Dictionary of Slang

whiz! excl.

a general excl.

[UK]Smollett Roderick Random Ch. LIII: Upon which I snatched up a firelock that belonged to a dead man, damme! Whiz! And shot his horse under him, damn my blood!
[UK]Dickens Pickwick Papers (1999) 26: Fired with an idea — rushed into wine shop — wrote it down — back again — whiz, bang — another idea.
[UK]A. Smith Medical Student 86: ‘Whiz-z-z-z-z-t!’ shouts Mr. Manhug.