flat spin
noun
1- Aeronautics a spin in which an aircraft descends in tight circles while remaining almost horizontal【航空】水平螺旋。
1.1
- in sing. Brit. informal a state of agitation or panic〈英, 非正式〉躁动不安; 惊慌失措：
a scandal has put the university into a flat spin.
一件丑闻使这所大学惊慌失措起来。