flat spin
noun /ˌflæt ˈspɪn/
/ˌflæt ˈspɪn/
(specialist)Idioms - a movement of an aircraft in which it goes gradually downwards while flying around in almost horizontal circles
（飞机的）平旋，水平螺旋下降，平面旋转下降
Idioms
in a flat spin
- very confused, worried or excited
慌乱；惊慌失措；紧张激动