Definition of “Astroturfing”

Since the Cudahy blogsphere is hot on astroturf today, I figured I’d give everyone another definition of the term.  From Wikipedia -
“Astroturfing in American English is a neologism for formal public relations campaigns in politics and advertising which seek to create the impression of being spontaneous, grassroots behavior, hence the reference to the artificial grass [...]

Definition of libel

Since the topic of sockpuppeting and misrepresentation has been coming up as of late, I figured I’d help everyone out with a definition I found on dictionary.com. Todays word is libel. My favorite definition of the term is:
Anything that is defamatory or that maliciously or damagingly misrepresents.