1. An internet forum member whose user
ID is 10,000 or higher. This separates them from the established members and instead classifies them as a newfag. Other numbers can be selected (such as 20k, 30k, etc) but 10k is the most common cut-off.
2. An internet forum member whose user ID is within the range 10,000 to 10,
999. This meaning can be applied to any number as
well, but specifies exactly which thousand rather than a cut-off
point.
This term only applies to members of forums that require registration.