Originally Posted by YozoraHoshi
Sannin means three ninjas and only Orochimaru, Tsunade and Jiraiya can be refered to as a Sannin. They have been considered the best ninjas ever during their time(other than Yondaime). Even if ninjas like Naruto, Sasuke and Sakura have reached their level, they would not be given the title of a Sannin.
Those two appeared in a filler arc. If I was not wrong, either one or both of them got killed in action or something. The filler arc starts at episode 169.
Hope this helps
Both you and oak girl are wrong.
Sannin= San and Nin
Sannin= 3 ninja.
HOWEVER, sannin can be used to describe any three ninja, legendary sannin is specific to orochimaru,jyara (sp?) and Tsunade.