1. The button or switch that an online gaming site toggles on or off, subsequently rigging the game for a particular player.
Note: This term was created by PokerRoom.com player "monkeyzero". TradeMark laws may apply to its usage.
ex. 1. "I was the favorite to win every hand I was in, but I ended up losing my bankroll because they got the Doom-Switch on me."
ex. 2. "I won two hands in a row. I think they turned my Doom-Switch off."