Mexican wave

英 [ˌmeksɪkən ˈweɪv]

美 [ˌmeksɪkən ˈweɪv]

n.  墨西哥人浪(尤指体育比赛中看台上的观众依次站起坐下而形成的波浪状场面)

牛津词典

noun

• 墨西哥人浪（尤指体育比赛中看台上的观众依次站起坐下而形成的波浪状场面）
  a continuous movement that looks like a wave on the sea, made by a large group of people, especially people watching a sports game, when one person after another stands up, raises their arms, and then sits down again

柯林斯词典

• 墨西哥人浪(人群依次站起挥动双臂再坐下所形成的波浪式场面)
  If a crowd of people do aMexican wave, each person in the crowd stands up and puts their arms in the air after the person to one side of them, creating a continuous wave-like motion through the crowd.

in AM, use 美国英语用 wave