1. Lacking taste, style, or sophistication; tacky or unfashionable.
Usage: British informal; often used dismissively

1. Used as an intensifier or mild expletive; used to express annoyance or emphasis.
Usage: British informal; euphemistic

Examples

• That naffing sweater is absolutely hideous.
• Stop naffing about and get to work.
• The decorations were a bit naff, if you ask me.
• This is a naffing waste of time.
• He wore the most naffing outfit to the party.
• Where's that naffing remote control?