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refers to ideas or abstract thought processes that you experience when you are under the influence of cannabis.

high+idea = hidea
1: combining the breakfast and lunch menu at mcdonalds by timing your order right at the time of the menu change. hidea.
by gtangsta March 10, 2010
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2
A brainwave that hits you when completely intoxicated. Particularly prevalent in the advertising industry.

After my seventh gram of Columbian marching powder I had some seriously awesome hideas for the development of the new campaign!
by CapTim November 22, 2007
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3
An idea that sounds absolutly brilliant when you're high, but loses its appeal as soon as sobriety sets in.
As I was sitting in the bathroom crying because I peed my pants, I realized that it was a very bad hidea to finish the whole bag of mushrooms... From now on I'm going to practice moderation.
by bethabean September 08, 2016
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