whiz-bangalso whizz-bang (wĭz′băng′, hwĭz′-)Informal
One that is conspicuously effective, successful, or skillful: a whiz-bang of a speech.
1. Conspicuously effective, successful, or skillful: a whiz-bang ad campaign.
2. Very rapid and eventful; rushed: whiz-bang pacing; a whiz-bang schedule.
[From whizzbang, a shell used in World War I that was heard only an instant before landing and exploding : whiz + bang.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Firearms, Gunnery, Ordnance & Artillery) a small-calibre World War I shell that, when discharged, travelled at such a high velocity that the sound of its flight was heard only an instant, if at all, before the sound of its explosion
2. a type of firework that jumps around emitting a whizzing sound and occasional bangs
informal excellent or first-rate
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014