nerdnado Share definition Flag A nerdnado is when something nerdy spreads like a class 5 tornado across the internet world. When digg pulled the story abort the AACS key off the main page, the number spread like a nerdnado. nerdnado by Rolling Thunder May 21, 2007 0 0 Get merch Get the nerdnado mug. Buy Now — $32.95 See more merch