The Phew! emote is an Uncommon Fortnite emote. Phew! was available via the Item Shop for 200 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite Phew! Skin Details
I was almost worried for a second.
Fortnite Phew! Skin PNG Images
Here is the PNG images of Phew! below!