Bring something, especially an error or fault, repeatedly and forcefully to someone's attention. For example, I know I was wrong, but don't rub my nose in it. This expression alludes to the unkind practice of housebreaking a dog by rubbing its nose in its feces. [Mid-1900s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.