The Cloud – Synonym for the Internet. Coined because of all those network illustrations in books that frequently show the Internet in a network topology as one of those grade-school-simple clouds.
AMVs – Short for “Anime Music Videos,” amateur videos that take excerpts from Japanese anime and mash them together with a popular piece of music. The term has been around for a while but YouTube has made them all the rage.
Ratpacking – Gangbanger term for swarming the target of a gang assault using mobile phones and two-way pagers to coordinate the attack.