I only know that term when referring to a lake or similar. Something like: It’s a hot day, let’s jump into the (kühle nass).
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lemmyausmister@feddit.org 18 hours ago
In Germany das kühle Nass. The cool wet.
iamkindasomeone@feddit.org 16 hours ago
kossa@feddit.org 4 hours ago
OG German nickname is Gänsewein - the goose’s wine.