Kerfuck Share definition Flag 1.)Interjection: used as an exclamation of surprise or disgust. 2.)Adjective: Describes a noun as really cool. 1.)Kerfuck son! That be disgustin'! 2.)Kerfucking sweet Gina! Kerfuck by Roberto_Benigni February 17, 2004 Get the Kerfuck mug.