In ShadowRun, a person who interfaces with the Matrix with a cyberdeck (often shortened to deck). May or may not have legitimate reasons and/or motives (could be a corporate drone or a hacker, etc...).

Deck"er (?), n.

1.

One who, or that which, decks or adorns; a coverer; as, a table decker.

2.

A vessel which has a deck or decks; -- used esp. in composition; as, a single-decker; a three-decker.

 

© Webster 1913.