NFD or Non-Fungible Dumbass is a person who buys NFTs thinking they will uphold their value or will increase in value.
Person 1: Hey check out this NFT I bought!
Person 2: How much was it?
Person 1: $15,000 why?
Person 2: Do you really think it will uphold a value of 15,000 dollars?
Person 1: Yes!
Person 2: You NFD (Non-Fungible Dumbass).