A Grebbler must do the following things:

-Gain 50 lbs per week.
-Sit at the computer constantly. Do not move.
-Do not pay attention to anything else but the computer.
-Do not shower.
-Do not take eyes off of screen.
-Have someone feed you instead of getting up and getting food yourself.
-Do not use the restroom.
-Skip school/work to play WoW.
-Cry of joy when you reach level 100.
-Try to find a job where you would be paid to play WoW.