Nice-to-Have
A feature or request that would be welcome but isn't required. The official second tier of priority, and the unofficial graveyard: nice-to-haves are where stakeholder wishes go to be politely never built.
Heard in the wild
“Dark mode is a nice-to-have; launch blocking it is not.”
Tone check: Cliché
If your request gets labeled nice-to-have in the meeting, it has been declined with extra steps.