What it may mean ...

... from Aynsley Kellow
Professor and Head of the School of Government at the University of Tasmania. Expert reviewer for the the United Nation's IPPC (Intergovernmental Panel on Climate Change) Fourth Assessment Report: Climate Change and Key Vulnerabilities: Climate science: The leaked emails. (Hat tip, Dave Lull.)

So it's certainly not just the case of some colourful language being expressed in emails amongst scientists. What you have is evidence of a quite clear willingness to manipulate raw data to suit predetermined results, you've got a resistance to any notion of transparency, an active resistance to freedom of information requests or quite reasonable requests from scientists to have a look at data so that it can be verified.

Now, what is it that you don't understand?