The loser is a hand gesture made by extending the right thumb and index fingers, leaving the other fingers closed to create the letter L, interpreted as "loser", and generally given as a demeaning sign.
[1] Sometimes this is accompanied by raising the hand to the giver's forehead.
[2] In Brazil, the "L" is the political symbol of voting in Lula da Silva for president.
[3] Also, in Brazil, Germán Cano, soccer player from Fluminense, use the L to commemorate when he scores a goal.
[4] Also in Brazil, an "L" handsign is used for cheering for Brazilian e-sports players from LOUD organization[5] (e.g. during "VCT 2023: LOCK//IN" event in São Paulo).