I often hear this word 'game'. One of the questions in the site talks about the meaning of "I am game". Users have replied that "I am game" implies that I am up for the challenge.
But I would like to know the exact meaning and context regarding the usage of the word 'game'. I've also seen it being used in Eminem's rap songs saying "I am married to a game".
So what exactly is this word word 'game'? What is its context and usage?