Alles hat ein Ende, nur die Wurst hat zwei - Everything has an end, only a sausage has two

Schwamm drüber - dont worry about it (literally means "sponge about it")

salonfähig - socially acceptable (literally "salon-ready, salon-worthy)

Fremdscham - vicarious cringe/embarassment

Fernweh - away-sickness (opposite of homesickness, which German has too - Heimweh)

verschlimmbessern - to make something worse in a genuine attempt to improve it