
zapfen
pitch-dark
A very rare, colloquial, and mostly outdated short form of 'zapfenduster' (pitch-dark), meaning completely dark or gloomy. The expression derives from the military 'Zapfenstreich' (tattoo), the signal to turn off the lights.
Ohne die Taschenlampe wäre es hier im Keller zapfen.
Without the flashlight, it would be pitch-dark down here in the basement.
