Based on the word derp, a derpstorm is a gathering of a lot of stupid or ignorant people. Derpstorms are often composed of very opinionated and outspoken people, as such people are prone to say or do stupid things.

Derpstorms can be of any size, but particularly small ones are often referred to as a derpdrizzle. Massive derpstorms can sometimes be referred to as a derpicane.
I had to leave the political rally early because it was a total derpstorm.
by swinky December 3, 2010
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An epic group made of random people
My Itech class is such a Derpstorm!
by Satinav January 30, 2011
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