definition of
whiz

[1] #1 whiz v. [whizz, whirr, whir, birr, purr] make a soft swishing sound; "the motor whirred"; "the car engine purred". wn

[2] #2 whiz n. [ace, adept, champion, sensation, maven, mavin, virtuoso, genius, hotshot, star, superstar, whizz, wizard, wiz] someone who is dazzlingly skilled in any field. wn

[3] #3 whiz n. a buzzing or hissing sound as of something traveling rapidly through the air; "he heard the whiz of bullets near his head". wn