—adj.hwiz'bang', wiz'-), [key]
1. Mil.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).
Informal.first-rate; topnotch: a whiz-bang navigator. Also,whiz'bang",whizz'-bang".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.