Unless you are completely unaware of pop culture
, you probably know the timeless Vulcan
Phrase "live long and prosper
". Created by Gene Roddenberry
, it is an embodiment of Vulcan ideals, as well as a fairly cool and dignified way of saying goodbye
However, this phrase seems to be part of the whole Vulcan gig, making it inaccessible to humans. So, in order to properly say ‘so long’ to a Vulcan properly, a non-Vulcan should say "peace and long life", accompanied by that "V" Vulcan hand-sign.