Katerfrühstück

Etymology
From.

Noun

 * 1)  first meal of the day after a night of heavy drinking, intended to alleviate the hangover

Usage notes

 * The meal can of course consist of any food the drinker craves. However, foodstuffs that are sour and/or high in fat/protein are widely believed to be particularly effective. Therefore, pickled herring (rollmops), which combines both of these features, is the prototypical food.