flog to death
flog (something) to death
To linger over or discuss something so long and to such a tedious and laborious extent that the subject is no longer of any interest or relevance. I think we should move on to another topic before we flog this one to death. The film's rhetorical message has been flogged to death by everyone you talk to.
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.
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.