Buzzwords
Twitterstorm = A sudden flurry of activity on Twitter that influences current events
– Urban Dictionary
Headlines
tweetstorm-button
Example
http://endfossilfuelsubsidies.org/twitterstorm
Elsewhere on the Web
http://www.wordnik.com/words/twitterstorm
https://www.google.com/search?q=twitterstorm
Planeta.com