FFN may refer to:
- FanFiction.Net, a fan fiction archive site
- Fast Food Nation, a book by Eric Schlosser
- Fédération Française de Natation, the French Swimming Federation
- Fetal fibronectin
- Free French Navy
- Friend Finder Networks, a social media website
- Full frontal nudity
- Radio ffn, a German radio channel
- "Full Frontal Nudity", an episode of Monty Python's Flying Circus
- Flip-Flop Nation, an exclamatory used when one wears flip-flop sandals
- Feedforward neural network, a type of artificial neural network
- F.F.N., romanian band
This disambiguation page lists articles associated with the title FFN.
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