Rock Paper Scissors is just an emote not secret signals in Fortnite Battle Royale game.
Carry out three simple moves with your hands
How to get
You can hold one from the Item Shop.
How to use
Control it to play against another friend to try to obtain something or a Legendary SCAR
You should save your time if the match becomes intense.
Remember to follow the original rules!
Rock beats Scissors
Paper defeats Rock
Scissors wins Paper
Two of the same form is a tie.