The vampiric discipline of concealment. Users of this discipline become more difficult to see without technological or supernatural means of perception, such as the vampiric discipline of Auspex. Rather than conferring invisibility, Obfuscate simply causes the observer's mind to ignore the person who is using Obfuscate, rather like a Somebody Else's Problem Field. Higher levels allow one to cloak more than one person in this fashion, to conceal one's true thoughts and feelings from others (as well as inconvenient diablerie lines!) and to prevent others from stumbling across your haven, similar to the Arcane Background in Mage: The Ascension. From White Wolf Game Studios' Vampire: The Masquerade role-playing game.

As Pseudo Intellectual points out, use of this discipline in live-action roleplaying games is commonly indicated by crossing one's arms across one's chest, or (as in my role-playing troupe) holding a hand in front of one's face, with the fingers spread.