quick witted

/kwɪk ˈwɪtɪd/
adjective
  1. Able to think and respond quickly, especially with clever or humorous remarks.
    • She is so quick-witted that she always has a perfect comeback in any argument.
    • A quick-witted student answered the teacher's tricky question before anyone else.
    • The quick-witted comedian had the audience laughing all night.
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