Definition of perfect storm noun from the Oxford Advanced Learner's Dictionary

 

perfect storm

 noun
noun
BrE
 
; NAmE
 
[singular](especially North American English)
 
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an occasion when several bad things happen at the same time, creating a situation that could not be worse The company blamed a perfect storm of bad trading conditions for a 90 per cent fall in profits.
See the Oxford Advanced American Dictionary entry: perfect storm