crook one's finger 屈指
crook one's arm 弯曲手臂
A: Why are you crooking your finger like that?
A：你为什么那样屈着手指？
B: I am trying to get your attention.
B：我正试着引起你的注意。
1) 弯曲，使成弧形
2) 屈起（手指或肢体）
1. 弯曲；屈起
verb
1. bending or curving something, or bending a part of the body like a finger or arm.