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Definition of Jack Robinson noun from the Oxford Advanced Learner's Dictionary

Jack Robinson

noun
 
/ˌdʒæk ˈrɒbɪnsən/
 
/ˌdʒæk ˈrɑːbɪnsən/
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Idioms
before you can say Jack Robinson
  1. (old-fashioned) very quickly; very soon
influence
verb
 
 
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