The Fist Pump emote is an Uncommon Fortnite emote. Fist Pump was available via the Item Shop for 200 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite Fist Pump Emote Details
Emphatically flailing fists.
Fortnite Fist Pump Emote PNG Images
Here is the PNG images of Fist Pump below!