The tag "skini" appears to be a misspelling or variation of the word "skinny." In the context of adult content and porn video tags, it refers to individuals with a slender, thin body type. These tags can help users find videos featuring specific physical attributes or preferences. It should be noted that this is not standard English, so it might not be understood by everyone. Therefore, it's essential to use clear and widely recognized terms when searching for content in adult websites or apps.