Definition

An acronym standing for Fap, Nap, and Crap—basically the holy trinity of self-care when you're feeling sick or terrible and need to reset your system, any combination works.

Example Usage

"I've been feeling awful all day, so I'm just gonna do an FNC and hope I feel better by tomorrow."

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=FNC&defid=4472338)