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Phrase(s): scrape through (something)
1. Lit. to move through something, scraping or rubbing the sides. • The car, going at a very high speed, scraped through the tunnel. • It just managed to scrape through. 2. Fig. to get by something just barely; to pass a test just barely. • Alice passed the test, but she just scraped through it. • I just scraped through my calculus test.
McGrawhill's American Idioms And Phrasal Verbs