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general::
Phrase(s): a blow-by-blow account [and] a blow-by-blow description
Fig. a detailed description (of an event) given as the event takes place. (This referred originally to reporting on boxing.) • I want to listen to a blow-by-blow account of the prizefight. • The lawyer got the witness to give a blow-by-blow description of the argument.
McGrawhill's American Idioms And Phrasal Verbs