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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