What's your definition of a hardcore gamer?

[Kaunisto]

I divide people to four levels:
1. people who don't play games
2. people who play games just for fun (=casuals)
3. (basic/"real") gamers
4. hardcore gamers
(Of course, one person can spread to more than one class, I myself slip to casual in some stuff and reach hardcore in other, but am generally a type 3.)
I also define that 3&4 are "gamers" and 1&2 are not. Gamers are people who understand the phrase "I'm in the middle of a game" (=therefore I will stay here and finish it despite there being food/sex/fire).

Hardcore is harder to define as there are so many dimensions to it.
It's about time, effort and money spend on games.
It's about skill and difficulty.
It can also be about number and variety of games you play.

The only general definition of hardcore gamer I can think of is that they do things that over 95% of gamers can't or won't, either having such skill/knowledge of specific game or spending so much time and effort (possibly including one's limited money) on games.