beat (one's) gums
To talk repeatedly and/or lengthily but without impact. I constantly beat my gums about dirty dishes in the sink, and the kids still never clean up after themselves!
beat one's gums
to waste time talking a great deal without results. (As if one were toothless.) I'm tired of beating my gums about this over and over. You're just beating your gums. No one is listening.
beat one’s gums
tv. to waste time talking a great deal without results. I’m tired of beating my gums about this stuff.