trigger finger
noun
1
- the forefinger of the right hand, as that with which the trigger of a gun is typically pulled（扣动枪械扳机的）扳机手指（通常为右手食指）。
2
- mass noun Medicine a defect in a tendon causing a finger to jerk or snap straight when the hand is extended【医】扳机（状）指, 弹响指; 扳机指肌腱鞘炎。