Dictionary.com
definitions

whiz-bang

or whiz·bang, whizz-bang

[noun hwiz-bang, wiz-; adjective hwiz-bang, wiz-]
noun
  1. Military. a small, high-speed shell whose sound as it flies through the air arrives almost at the same instant as its explosion.
  2. a firecracker with a similar effect.
  3. Informal. whiz1(def 5).
adjective
  1. Informal. first-rate; topnotch: a whiz-bang navigator.

Origin of whiz-bang

First recorded in 1910–15; orig. imitative
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for whizzbang

Historical Examples of whizzbang