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A secretive meeting of important people to plan a revolt or change.

Origin - In 2003, a group of people called 'HELP EARTH' were using violent ways to save the environment. They planned on taking down the oil buisnesses. A Petrocon was then held in April to try to find a way to stop 'HELP EARTH'.
Example 1- Me and my friends held a Petrocon to try and stop the robbers from getting inside the house.
Example 2 (from the origin above)- Leaders of the oil buisness held a Petrocon to try and stop 'HELP EARTH'.
by ABulverist April 13, 2017
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