Top Definition
A phrase used mainly by the gamer community to express a feeling of satisfaction after having successfully completed a particular task or venture.

"Achievement unlocked" is the official phrase used on Microsoft's Xbox 360 console. The phrase appears on the screen after the player has accomplished a specific in-game task.

The phrase was first used out of game context in the comedy series "The Guild."
Mariam: Victor, your idea to add nap rooms inside the corporate offices has been accepted and will be implemented next week.

Victor: Achievement unlocked!
by Coniption February 09, 2011

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