What do they mean and what word formation processes have created them? Kerry Maxwell's Buzzwords on the MacMillan Dictionary site is always a good source of information on new words, so there are links to a few of them here:
Omnishambles (already consists of Granny Tax and Pastygate among other ConDem disasters)
Can you think of any other new words which have appeared this year? Add them as comments if you can.
Edited on 14.05.12 to add:
Here's Zooey Deschanel. She's adorkable, apparently. I tend to agree.
Chatterboxing has also had an impact this year: it's when you tweet while you watch something on TV. For example #TheVoice Why is Danny standing on a chair and pumping his fist? It's only the title music.