NOTE: This card is not a promotional item; instead, it is unique to the German version of Munchkin 2: Unnatural Axe.
Caipiranha is printed in the fantasy Munchkin color scheme but may be used with any of the Munchkin card games.
The card name is a spoof of the word "Caipirinha," which is a type of alcoholic drink.
Here is a rough translation of the card text:
This drink is a hard one. Play during combat. +3 to either side. Usable once only.
500 Gold Pieces