https://www.gamespot.com/articles/fortnite-l-dance-in-the-world-cup-is-a-sight-to-be/1100-6460411/

France dismantled Croatia today to win the World Cup in Russia. French striker Antoine Griezmann put his side ahead 2-1 after knocking in a penalty kick. He celebrated the big goal by performing the brutal and humiliating Fortnite "Take the L" dance.

This is where the player makes an "L" shape with their hand on their face and then kicks their feet to each side in a brutal dance of humiliation and rudeness. You can see Griezmann perform the dance in the video below from FOX Soccer. He has it down pretty well, which is no surprise when you recall that he also did the dance after scoring a goal against Argentina earlier in the tournament.