UPD (Unrealized Potential Desire) is a term frequently used in fandom spaces, creative writing circles, and psychological analyses of media to describe the "slow burn" or the "what-if" tension between characters. Unlike traditional tropes, UPD focuses on the electricity of what could be, rather than what is.

In gaming and fan communities, is most commonly used as shorthand for "update" . Depending on what you're playing or reading, this could mean a few different things: