As defined by wikipedia:

Distraction. The diversion of attention of an individual or group from the chosen object of attention onto the source of distraction

As Tim Lambert over at Deltoid points out:

This is the science that the cracker who stole the emails from CRU wants to distract you from.

More about the hack over at Real Climate (background here, more context here). Head over to the Copenhagen Diagnosis to read the report in full (in update to the IPCC 2007 Working Group 1 report before the Copenhagen negotiations (COP15) next month).