FFN

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
 * F.F.N., romanian band