If you want to ruin your day, just look in the mirror.
Willst Du Dir den Tag versauen, musst Du in den Spiegel schauen.
Source
Lund, Erik. “10 German Jokes that are Actually Funny.” LifeHack, www.lifehack.org/350656/10-german-jokes-that-are-actually-funny. Accessed 27 Feb. 2024
