flail

1. V-T/V-I If your arms or legs flail or if you flail them about, they wave about in an energetic but uncontrolled way. 用力地胡乱挥动; 用力地胡乱摆动

His arms were flailing in all directions. 他的双臂使劲地胡乱挥舞着。

2. PHRASAL VERB Flail around means the same as . 用力地胡乱挥动

He started flailing around and hitting Vincent in the chest. 他开始胡乱挥舞双拳，打到了文森特的胸口。