Observer

word type: poker slang

  1. A person watching an online poker game who is not seated at the table.

Explained

Often referred to as a railbird, an observer is simply someone who has a window open of a poker game and is following the action. Often times players will observe their favorite pros playing online, or a friend who is deep in a tournament. When they chat, their text is referred to as "observer chat" and shown in a different font color.