catch (someone) flat-footed(redirected from catch them flat-footed)
catch (someone) flat-footed
To startle someone; to come upon someone unawares and/or when they are unprepared. Usually used in the past tense. The security guard caught the thieves flat-footed. That essay question in the exam caught me completely flat-footed.
See also: catch
Caught unprepared, taken by surprise, as in The reporter's question caught the President flat-footed. This usage comes from one or another sport in which a player should be on his or her toes, ready to act. [c. 1900]
See also: caught