If you say that something is naff, you mean it is very unfashionable or unsophisticated. The music's really naff. naff `his and hers' matching outfits. Unstylish, clichéd, or outmoded. Used in the imperative as a signal of angry dismissal. something that is naff seems silly, especially because it is unfashionable or shows a lack of good taste tacky (Perhaps from nyaff ). naff off used to tell someone rudely to go away