Avatar
A virtual representation of the player in a game. Also, a common name for the superuser account on UNIX systems (the other common name is root). [source: webopedia.com]

Also, any incarnation or embodiment, as of a quality or concept of a person. [source: merriam-webster]

Journalism 2.0
A slang term used to describe how the Internet has changed journalism, enabling journalists to cover more stories in different ways. The slang term “Journalism 2.0” is used to reference the Web 2.0 technologies such as blogging, audio, video, social networks, and online reporting tools that journalists use today.

RedBrowser
A type of cellphone Trojan horse that infects mobile phones running Java (J2ME). The Trojan spreads through a program known as “RedBrowser,” which claims to enable users to send text messages to a premium service at a low cost. The Trojan can be downloaded to the cellphone either via the Internet (from a WAP Web site), through Bluetooth or a personal computer. [source: webopedia.com]

Snake Oil
Refers to a cryptography or security product that makes exaggerated claims of what the product is capable of, giving the user a false sense of security. The term snake oil, which is credited to Matt Curtin for using in reference to computer security products, comes from the 19th-century American practice of selling cure-all elixirs in traveling medicine shows. Snake oil salesmen would falsely claim that the potions would cure any ailments. The term has been appropriated to mean security and encryption products that make impossible claims, such as unbreakable codes. [source: webopedia.com]

Portmanteau
A combination of two words and their meaning into one new word, or linguistic blend.

Slactivisim
Formed out of slacker and activism, the good intentions of some people towards supporting a social issue or cause without getting out of their chairs.

Socialnomics
The use of social media and its ability to produce positive and exponential return on investment (ROI) for companies and individuals.

Twettiquette
Short for “Twitter etiquette,” it is a slang term used to describe acceptable Twitter behavior. [source: webopedia.com]