whiz

Concise Oxford English Dictionary © 2008 Oxford University Press:
whizz /wɪz/ (also chiefly N. Amer. whiz)

▶verb (whizzes, whizzing, whizzed)

• 1 move quickly through the air with a whistling or whooshing sound.

  ■ move or cause to move or go fast.

  ■ (whizz through) do or deal with quickly.

• 2 informal urinate.

▶noun

• 1 a whizzing sound.

• 2 informal a fast movement or brief journey.

• 3 (also wiz) informal a person who is extremely clever at something. [influenced by wizard.]

• 4 informal an act of urinating.

• 5 Brit. informal amphetamines.

– derivatives
whizzy adjective (whizzier, whizziest).

– origin C16: imitative.