Grappa is a uniquely Italian drink. It is a strong spirit distilled from the fermented residue of grapes after they have been pressed in winemaking, i.e. Italian Brandy. The grappa is then either bottled at once, which creates white grappa (grappa bianca), or aged in wooden casks to create the yellow or brown-hued grappa known as riserva.
Since 1989 the name "Grappa" has been protected by the EU, meaning that the drink can only be called grappa if it's sourced and produced in Italy.
Traditional grappa is very strong, and it is a wonderful way to end a meal, drunk either as a shot on its own or added to an espresso.