This is the move you guys keep saying(a couple of you)(from wikipedia):
Shunshin no Jutsu (Body Flicker Technique)
Name: Shunshin no Jutsu, 瞬身の術, literally "Body Flicker Technique"
Type: C-rank, Supplementary
Users: Hatake Kakashi, Gaara, etc.
A high-speed movement technique. It is described as 'appearing with the wind and disappearing like the wind.' A very basic jutsu, it appears that most shinobi above Genin-rank know it.
Using chakra to activate the body, the user is able to move from one point to another with extreme speeds. This super-fast movement is almost impossible to see with the naked eye. To a normal person, it would seem as if the user has teleported. The amount of Chakra used depends on the distance and elevation between the user and the destination.
The one I think you're all referring to(the one used by the 4th) is this one:
Hiraishin no Jutsu (Flying Thunder God Technique)
Name: Hiraishin no Jutsu, 飛雷神の術, literally "Flying Thunder God Technique"
Type: S-rank, Supplementary, All ranges
Users: Yondaime Hokage
The jutsu of the Yondaime Hokage and the reason behind his nickname "The Yellow Flash of Konoha" (木ノ葉の黄色い閃光, Konoha no Kiiroi Senkō).
This jutsu allows the user to move over large distances with ultra-high speed. Although it is often compared with the Shunshin no Jutsu, the speed of the Hiraishin is much faster than that of the Shunshin and the principle behind Hiraishin is similar to Kuchiyose no Jutsu.
To activate this jutsu, the user needs a special seal or "Jutsu-shiki" (術式, "Technique" or "Jutsu formula") to mark the destination. After this is done, the user can almost instantaneously transport himself to the location of the Jutsu-shiki.
The Yondaime applied the Jutsu-shiki in advance to weapons such as kunai. It is also possible to leave a Jutsu-shiki in an area touched by the user.
Read ch. 239-244 if you want to see the second(better) jutsu.Originally Posted by Winged Dancer