As far as I am aware there isn't an actual drink called "Dutch Courage" (I stand to be corrected on that though)...the sayings about anything dutch come from the time of the 17th century when the Dutch were hated military and commercial rivals of the English. Examples include Dutch reckoning, a bill that is presented without any details, and which only gets bigger if you question it, and a Dutch widow, a prostitute. In the same spirit are Dutch auction, one in which the prices go down instead of up; Dutch courage, temporary bravery induced by alcohol; Dutch metal, an alloy of copper and zinc used as a substitute for gold foil; Dutch comfort or Dutch consolation, in which somebody might say "thank God it is no worse!"; Dutch concert, in which each musician plays a different tune; Dutch uncle, someone who criticises or rebukes you with the frankness of a relative; and Dutch treat, one in which those invited pay for themselves.