有首歌叫everybody,里面有句歌词Now throw Ur hands up in the air,and wav

有首歌叫everybody,里面有句歌词Now throw Ur hands up in the air,and wave'em around like u just don't care.意思是“现在把你的手向上举,不要在乎其他人只要自在地摆动”.我就是不明白其中的wave'em是什么意思,感觉很奇怪.估计这是道难题!