whiz / (h)wiz/ (also whizz) • v. (whizzed, whiz·zing) 1. [intr.] move quickly through the air with a whistling or whooshing sound: the Iraqi missiles whizzed past | fig. the weeks whizzed by. ∎ (whiz through) do or deal with quickly: Audrey would whiz through a few chores in the shop. ∎ [intr.] cause to rotate in a machine, esp. a food processor: add remaining sauce and whiz until smooth. 2. [intr.] inf. urinate.• n. 1. a whistling or whooshing sound made by something moving fast through the air.2. (also wiz) inf. a person who is extremely clever at something: a computer whiz.3. inf. an act of urinating.