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Phrase(s): flog something to death
Fig. to dwell on something so much that it no longer has any interest. • Stop talking about this! You’ve flogged it to death. • Walter almost flogged the whole matter to death before we stopped him., Phrase(s): flog someone to death
Lit. to beat someone to death with a whip. • In the movie, the captain ordered the first mate to flog the sailor to death.
McGrawhill's American Idioms And Phrasal Verbs