The "Fortnite Twerking Emote" is a classic piece of internet folklore (and great clickbait). While you can find plenty of viral dances in the Icon Series—from Bruno Mars to Doja Cat—you won’t find this specific move in your locker anytime soon.
As of right now,
Some existing emotes have specific frames that, when paused or looped correctly in a video editor, can look like different movements.