"Tradmin" is a combination of the words "troll" and "admin." It means an admin for a website who is a troll, or a troll admin. It originated from Kongregate. The long version is tradministrator.
MicroGamer15: Zshadow is such a tradmin! He won't let us say newfag!
ayon kay MicroGamer15 ika-07 ng Pebrero, 2011