Select the most appropriate meaning of the underlined idiom in the given sentence.
Stop flogging a dead horse and concentrate on your career.
Answer & explanation
Correct answer: option 1
The correct answer is - to waste time on useless things.
The idiom "flogging a dead horse" means to continue to waste time or energy on a particular task or situation that is already failed or concluded, and it cannot be brought back to life, like a dead horse.