Null unit is a derogatory slur used by programs in the computer world. While its exact meaning is unclear, it is used in the same context as the word "idiot". Null is an English word meaning "nothing" or "valueless", and in computing terms, "null" usually refers to something indicating "no value" or an "unknown value".
In the early days of CGI, the unit of measurement used to indicate a relative fraction of the available width & height of the column & row it occupied in a grid layout, was also called a 'null unit'.
Sark called his Lieutenant a "null unit" after Tron, Flynn, and Ram escaped from the Game Grid.
| “ | We better [get them], null unit! | ” |
—Sark | ||