What is 000?
1.
This is the network term for "Unknown Error".
Similar terms are 404, 403, 500 & 613.
Unknown
Error
Crash
2.
Poser, as in someone who misrepresents themselves while online.
"I did a 000 last night on IRC, said I was a horny 18-yr-old virgin to see how many pervs came out of the woodwork."
See