Who's your best mate?
Best Mates dance is a Rare Fortnite Emote. This emote is one of the Fortnite Battle Pass cosmetics in Chapter 1 Season 3. It was available once you have reached Tier 63.
The gesture Best Mates belongs to Chapter 1 Season 3. This gesture was available as a reward by unlocking Level 63 of Battle Pass from Chapter 1 Season 3.