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                           general:: 
                            Phrase(s): go into a nosedive [and] take a nosedive
1. Lit. [for an airplane] suddenly to dive toward the ground, nose first.  •  It was a bad day for flying, and I was afraid we’d go into a nosedive.  •  The small plane took a nosedive. The pilot was able to bring it out at the last minute, so the plane didn’t crash. 2. Fig. [for someone] to fall to the ground face first.  •  She took a nosedive and injured her face. 3. Fig. to go into a rapid emotional or financial decline, or a decline in health.  •  Our profits took a nosedive last year.  •  After he broke his hip, Mr. Brown’s health went into a nosedive, and he never recovered.
                        
                        
 
                        
                            McGrawhill's American Idioms And Phrasal Verbs