wiz

Etymology 1

Clipping of wizard.

noun

1. A person who is exceptionally clever, gifted or skilled in a particular area.
   a maths wiz
2. (Internet, informal) A wizard; an administrator of a multi-user dungeon.
   The wizzes are only the junior grade of the MUD illuminati. The people who attain the senior grade of MUD freemasonry by starting their own MUD, with all due hubris, are known as gods. 2003, David Lojek, Emote to the Max, page 11

Etymology 2

Onomatopoeic for the sound made by urination.

noun

1. (vulgar, slang) Alternative spelling of whiz: an act of urination.
   I have to take a wiz.

Etymology 3

See with.

prep

1. (slang, especially represents slurred or drunken speech) Pronunciation spelling of with.