belabor the point

Repeat an argument or other issue over and over, harp on something, as in We've discussed her decision—let's not belabor the point. This term dates from the mid-1900s and derives from belabor in the sense of “assail with words,” a usage dating from the late 1500s.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.