*in class*
David: What did you have for letting nah today?
Ethan: I'm sorry David but that conversation is nafc and is inhibiting my learning please converse about something more afc.
Short for, Not A Fucking Cloud In The Sky. This is a landscape photographer's greatest nightmare. You do not want NAFCITS weather. When people tell you it is a nice day outside in a NAFCITS situation, it is your job to treat that person with utter disdain.