Can somebody tell me 10 neologisms that have been incorporated into the English language in the last 5 years?

[Eric]

Also include the part of speech each belongs to if possible.

[Ted H]

birther (n) – a conspiracy theorist who challenges President Obama’s birth certificate
teabagger (n) -a person, who protests President Obama’s tax policies and stimulus package, often through local demonstrations known as “Tea Party” protests (in allusion to the Boston Tea Party of 1773)
defriend (v)
wall (n) facebook
dot.com (n)
blogosphere (n)
tweet (v)
twitter (n)
tweeps (n) sweeple (n)
clickstream: unique pattern of an individual's Web surfing habits (n)
cybersquat: to register a Web address with the sole purpose of trying to sell it for a profit (n)
blognut: blog fanatic (n)
recessionista (n) people finding ways to save money in recession
umbrella trend (n)
staycations (n) staying at home instead of vacation
truthiness (n) S. Colbert
Obamacare (n)
sexting (v)

Others on this link
http://blog.oup.com/2009/11/unfriend/