Peace and long life, live long and prosper. - Mr. Spock.
A hand gesture consisting of a raised hand, palm forward with the fingers parted between the middle and ring finger, and the thumb extended. The gesture, primarily seen in the Star Trek series (usually used by Vulcan science officer Spock), was based on a priestly blessing used by Jewish Kohanim.
In the context of Danbooru, this is a variation of the v gesture.
This tag implicates salute (learn more).