Trade chat in World of Warcraft.
Called such since /2 is the command to bring up trade chat (by default) from the chat line.
2. Trade Troll1: Dude, where's my murloc??
2. Trade Troll2: Lord of the Murloc
2. Trade Troll3: Harry Potter and the Murloc of Fire
2. Trade Ghostcrawler: Oh god. Not this again. GTFO MY /2!