Cuf is a word commonly used to substitute the word fuck. It is mostly used amongst people that are trying slowly to stop cursing. Cuf is the word Fuck spelled backwards. It origins come from the song "Don't Curse" by Heavy D, Grand Puba, Cl Smooth and others. It is frequently used by Jake Chaplin and Quasie Jones in an attempt to stop the word Fuck from being used
"Ahhh Cuf i hit my head"
"Cuf i forgot to study for the math test"