Nailed it is an Uncommon Fortnite Emote from the Splinter Agent set. Nailed it was available via the Battle Pass during Season 18 and could be unlocked at Tier 0.
How-to Get the Nailed it Emote
Nailed it is part of Season 18. If that season is still currently in the game, you can obtain this item by purchasing and/or leveling up your Battle Pass.
Nailed it Video Showcase
Splinter Agent Set
Nailed it is part of the Splinter Agent set! You can find all of the items that belong to it below.