The most ultimate high five on Earth. The highest of high, the mightiest of the might; it is the king of high fives. The VH-5 can only be shared between two people who have literally gone through most of their ups and downs together, between people who understand each other better than they understand themselves, and between those who would feel incomplete without each other. To give someone a VH-5 is telling them how they've made everything, especially your life, better, how they have become one of the very few reasons why you make it through the day, and how they can make you smile even when you don't want to. Normally, you would only find one person who is truly worthy enough of giving a VH-5. Someone who you can imagine 30 years from now, sitting on a porch with, drinking wine/champagne or whatever, reminiscing about the good ol' days and think about how you've made it through all the shit. This person would be like a best friend, but more. That someone who makes you a better person. No, actually, they don't make you a better person. You do that by yourself because they inspire you. It is someone who you would carry with you forever. It is that one person who knew you, believed in you and accepted you before anyone else did and when nobody else would. And no matter what happens, you'll always love them and nothing could change that. You can almost call this person you can share a VH-5 with your soul mate, not necessarily romantically, but platonically too.

When you eat dirt for the first time and leave your family to build a shack in the woods

Virtual High Five.
This needs to be said when speaking to someone on the computer and need to congratulate them for a good job.