Top Definition
Attributed to the unwarranted panic and fear of Phoenix, Arizona residents before or after any type of precipitation event.
Last night on my way back from the Old Town bars I had to turn my windshield wipers on while I was in the 101. It was rainpocalypse.
by Tmag322 October 14, 2010
1 more definition
The apocalypse but with rain. Lot's of rain. Lot's of rain.
The rainpocalypse has finally arrived in San Diego.
by CodinGuru January 20, 2010

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