whiz; whizz
noun
1
a genius; somebody who is extremely proficient at a given activity. An abbreviation of 'wizard' US, 1914.
2
an act of urinating. Often in a construction such as 'take a whiz' US, 1971.
3
whisky US, 1953.
4
on the railways, the pressurised air that operates the brake system US, 1977.► on the whizoperating as a pickpocket US, 1950