tailspin

1 ENTRIES FOUND:
tailspin /ˈteɪlˌspɪn/ noun
tailspin
/ˈteɪlˌspɪn/
noun
Britannica Dictionary definition of TAILSPIN
[singular]
1 
: a condition in which an airplane is falling rapidly while turning around and around
2 
: a state in which something quickly becomes much worse