I will keep it short and simple In the original Japanese version The term we usually refer to as "Super Saiyan" is pronounced as "Sūpā Saiya-jin" So its short term is referred to as SSJ. read more
If you know goku is a super saiyan, then how can you miss SSJ .I guess you have watched dragon ball z only, never bothered to read about it. SSJ = Sūpā Saiya-jin Simply super saiyan. In funanimation dub, its called super saiyan, and in japanese its calle supa saiya jin. read more
The full form of SSJ is Super Saiyon Jin. It is a part of the video game franchise called Dragon Ball Z. It is the advanced transformation by members of the Saiyon race. read more