fladdermus

From Old Swedish flædhermus. Equivalent to fladder (“fluttering”) +‎ mus (“mouse”). Slang sense influenced by pussy sense of mus – "flutter-pussy."

fladdermus c

1. a bat; a nocturnal flying mammal
2. (slang) a promiscuous woman

• läderlapp (“vesper bat”)

• “fladdermus”, in Svensk ordbok [Dictionary of Swedish] (in Swedish)
• “fladdermus”, in Svenska Akademiens ordlista [Wordlist of the Swedish Academy] (in Swedish)
• “fladdermus”, in Svenska Akademiens ordbok [Dictionary of the Swedish Academy] (in Swedish)
• Svensk MeSH
• Fula Ordboken
• Slangopedia