Twitter

Urban Dictionary has many definitions twitter. Here are two I thought to explain twitter in less and 140 characters:

-The facebook "status" bar...without the rest of facebook.
-A social networking site that's perfect for stalking people with ease.

Twitter is a way to see what people are doing and saying without going through your facbook wall. Most people use twitter to follow their close friends, favorite celebrities, and favorite brands or organizations. It's fun to always have something new to look at and read on twitter.