Super SaiyanSuper Saiyan ( 超 スーパー サイヤ 人 じん , Sūpā Saiya-jin, lit. Super Saiyan Person) is an advanced transformation assumed by members and hybrids of the Saiyan race with sufficient amounts of S-Cells in the Dragon Ball franchise.
The reason Super Saiyan is SSJ is because the actual Japanese term is “Super Saiyajin.” This is why many fans add the J, to symbolize that very fact. Saiyajin is literally Japanese for “People of the Saiya”, or Saiyans.
Acronym. Definition. SSJ2. Super Saiya-Jin level 2 (Dragonball Z Universe)