think on one's feet

think on (one's) feet

To be able to think clearly in times of stress. Thank goodness you could think on your feet and find another way to stop the pipe from leaking. The whole basement would have flooded otherwise!
See also: feet, on, think

think on one's feet

React quickly, be mentally agile, as in Reporters bombarded him with difficult questions, but Bill was very good at thinking on his feet . This expression uses on one's feet in the sense of "wide awake, alertly." [First half of 1900s]
See also: feet, on, think