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Phrase(s): firing on all cylinders [and] hitting on all cylinders
1. Lit. [of an internal combustion engine] having all its cylinders working and thus providing the maximum amount of power. • The old car is firing on all cylinders despite its age. • This thing’s not hitting on all cylinders. 2. Fig. working at full strength; making every possible effort. • The team is firing on all cylinders under the new coach. • The factory is hitting on all cylinders to finish the orders on time.
McGrawhill's American Idioms And Phrasal Verbs