Cloudbursting
Technical term referring to the transition to a dynamic state of a network infrastructure as an events mitigation process. It entail to both asynchronous and synchronous expansion toward or inside a computer cloud. Each such burst is followed by a period of quiescence before the next burst occurs.
Event such as high workload and extreme traffic spike can cause a correctly configured environment to cloudburst.
The term seem to have been used first, in July 2008, by William Fellows (Principal Analyst @ 451group) in a report and pushed forward by Jeffrey Barr (Technology evangelist of Amazon AWS) on a blog in august 2008.
This is my personal definition, yet I think it summarize the process. Anything that needs to be added ?