whizzbang

Collins Concise English Dictionary © HarperCollins Publishers::

whizz-bang, whiz-bang noun

1. 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

adjective

1. excellent or first-rate