Top Definition
(on sth/sone, transitive verb) To lose all interest in what is happening or what someone says, causing one to switch off and shut down emotionally.

Derives from the days of Windows 95 when a program, running into an error, would display a dialog box saying "This program has performed an illegal operation and will be shut down."
"I illegally operated on that idiot ages ago."
by Dragonero March 10, 2010
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