The term "vindictus" seems to be a misspelling or misinterpretation of the word "vindictive." Vindictive, in the context of porn video tags, means that the content involves one or more participants engaging in sexual activity with a desire for revenge or to get back at someone. This could involve scenarios such as sex with an ex to get even, or perhaps involving someone's partner or spouse in order to cause emotional distress or humiliation. It is important to note that this tag refers to the intent or motivation behind the scene, not necessarily the actions themselves.