Kingmaker

[Gregory]

a person who influences the choice of people for powerful positions within an organization

[Tracie Lynn]

When someone playing a [boardgame] cannot win, but is in a position to [determine] who does. Someone who, instead of trying to win, helps an [opponent] win.

[Kai]

An alcoholic shot consisting of 50% [vodka and] 50% red [Amp energy drink] served in a double [shot glass].