Miki-ati is a Japanese phrase which can be translated to "touching Miki" or "playing with Miki." In the context of porn video tags, this likely refers to scenes involving touching or playing with someone named Miki. This could include various acts such as massages, sensual touching, or other intimate interactions between individuals and Miki. It's important to note that the term 'Miki' is a name and may refer to an actual person or a character in the content.