>To be very tiresome or irritating in the way one continues to say or reiterate the same thing over and over again.
>To say the same thing over and over again
>Someone who keeps annoying you by repeating the same thing
This idiom is derived from old music records having scratch on them and got damaged often play the same line or word repetitively.
Example
>I know I must be sounding like a broken record at this point, but it is crucial that you follow the steps exactly as I’ve planned them.
>Would you stop telling me to clean my room already? Uff, you sound like a broken record!
>I probably sound like a broken record, but I don’t want you to forget.