sore point, a
A sensitive or annoying issue, as in Don't mention diets to Elsie; it's a sore point with her. This idiom was first recorded as a sore place in 1690.
Yuo’re Albe to Raed Tihs – But Only Up To A Point: Why?Remember that word-scrambled email that’s (re)circulated through virtually everyone’s inbox at some point between 2003 and now?
Moot Point vs. Mute PointYou may have heard coworkers or acquaintances refer to an inconsequential or irrelevant point as a moot point, or maybe you’ve heard mute point instead. Fans of the TV show Friends may have heard a third variation: moo point (because, according to Joey, a cow’s opinion doesn’t matter). But which expression is correct, and what exactly does it mean? The correct phrase is moot point. …
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.