There's quite a bit more to this. The term comes from chess. Normally people play standard openings, and some openings are gambits. In this, the player typically sacrifices a pawn early for future positional consideration, as well as tempo. In general, a gambit describes a risk, since if the positional advantage does not amount to material gain, the player has lost something for nothing. Interestingly enough, many of the gambits occur as white, the side which begins with the advantage.