1. Most lacking in taste, style, or sophistication; most tacky or unfashionable.
Usage: British informal/slang; superlative form of 'naff'

Examples

• That naffest outfit at the party was definitely the neon tracksuit.
• He wore the naffest tie I've ever seen to the formal dinner.
• The naffest decoration in the room was the plastic flamingo in the corner.
• She thought his jokes were the naffest attempts at humor she'd heard all year.
• The naffest fashion trend of the decade was arguably the oversized shoulder pads.