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A derogatory term used to describe a computer user who has caused computer errors through their own actions.

Also commonly known as an I.D.10-T error (l33t-speak for idiot)
Nerd 1: "So did you find the problem with Cathy's spreadsheet?"
Nerd 2: "You bet - defective user."
Both laugh knowingly.
by James Fraser January 31, 2008
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