From Longman Dictionary of Contemporary Englishbe firing on all cylindersbe firing on all cylindersinformalCRAZY to be thinking or doing something well, using all your mental abilities and energy When the team’s firing on all cylinders, they can beat the best in the league. → fire
Examples from the Corpus
be firing on all cylinders• The latter is a book in which the author is firing on all cylinders.• This company is firing on all cylinders.• Your Reticular Activating System is firing on all cylinders, your cortex is turning somersaults. 