Aus dem Monatsbericht der brasilianischen Niederlassung meines Arbeitsgebers:

Christmas in Brazil
It is a tradition in Brazil that friends or colleagues in companies make for Christmas the so called "hidden friend". For your "hidden friend" you have to buy a gift, which is delivered to him during a party or lunch just before Christmas. It is always funny to discover who was your "hidden friend" and what he bought for you. The value of the gifts is fixed previously, in order to make the joke not too expensive, and enable everybody to participate.

Das sollte doch jetzt bitte völkerverbindend wirken.

die Kaltmamsell