FCK

FCK may refer to:


 * A short form of fuck, an English-language profanity
 * F.C. Copenhagen (Danish: F.C. København), a Danish football club
 * 1. FC Kaiserslautern, a German football club
 * FC Koper, a Slovenian football club
 * Furnace Creek Airport, near Death Valley, California, United States
 * FCK (print ad), an award-winning ad for KFC UK
 * Flat-chested kitten syndrome, a feline disorder