One who is skilled in the art of h4xlng(hacking). A real hacker does not commit malicious acts. One who does that is known as a cracker(this is not a lie) or a black hat h4x0rz.
To be an ubar 1337 programmer. This person can gain access to virtually anything involving a computer. It may be done for pleasure and harmless jokes, or it may destroy other computers. These people are usually huge nerds.
Erich: Wow Marty, I am such a h4xor. I justshut down MIT's power.
Marty: That's totally awesome. You're ubar 1337.
Marsh: Man, I wish I wasn't such a noob and could be a h4xor too.
A real Yu-Gi-Oh card widely thought by non-players to be a "photoshopped" or spoofed card. The card allows a player to : "Pay 500 Life Points. Look at your opponents hand and all Set cards on his/her side of the field."
Used by douche bags (see douche) worldwide to describe their incredible "pwning" skills, usually during an online video game session or posted on a forum for 40-year old guys living in their parents basement wearing wife-beaters and old boxer shorts.