What is 0day?
Used by software pirates to describe material (software, music, movies) released the same day it hits stores
"Jesus, my gardener, has all the 0day"
Relating to a security vulnerability or exploit that has not been released or known about by the general public. Often begged for on lists such as "Full-Disclosure" by kiddies.
Sometimes lamers will call it Ohday (OH-day)
1. Full-Disclosure Where teh 0day
2. Damn I must've got pwned by some 0day.
Generally used when talking about cracked software, cracked and released the same day as the software was legally available.
That copy of DOOM I just got off of Funet is 0day man!
Used in IRC or other chat (in the negative) as a sarcastic comment to something already said or "old news."
<person_1> X just happened, check out
<other people> Very interesting, person_1!
... 3 hours later ...
<person_2> OH EM GEE X JUST HAPPENED
<other people/person_1> That's so not 0day.