“Sukuna” does not have a widely recognized full form as it primarily refers to a character in Japanese folklore and popular culture, particularly in the anime and manga series “Jujutsu Kaisen.” In this context, Sukuna is known as Ryomen Sukuna, a powerful cursed spirit and the main antagonist of the series.
If you are referring to something else related to “Sukuna” or if it stands for an acronym in a specific context, please provide more details, and I would be happy to help!