A business maneuver in which an employee continually sends insubordinate emails to his/her boss with the intent of embarrassment and or emasculation. Similar to the outdoor practice of slack lining it can be risky and carry with it the complete destruction of one's career.
John was really slack lining when he sent his boss an email with all the ways he had misinterpreted the sales data, luckily he copied the CEO on the email and his boss was later fired.
by Martin Kaan February 13, 2015
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1. noun. A long piece of webbing, hanging loosely between two solid objects but not touching the ground. Used to walk upon while attempting to maintain balance for entertainment, usually drunk, usually by climbers. Advanced slackliners are able to: reverse direction, stay on indefinitely, jump, juggle, swing to and fro.

2. verb. To play on the slack line.
Those hosers think they're setting up a slack line, but it's more like a tightrope.

Dude, you gotta have at least another beer before you stop falling off the slack line.
by bluwater September 26, 2004
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