Definitions for "DDoS"
Distributed Denial of Services attack
This is a version of the DoS attack that spread around.
A type of external Internet attack, in which multiple sources attack a single target system, with the goal being denial of service for its users. DDoS attacks flood the target system with incoming messages at a rate much higher than it can process, therefore slowing it down to a level where it is rendered useless to users.
an annoyance, not terrorism, because, you know, life fucking goes on if you webserver is down