1. Emphatically draw someone's attention to embarrassing fact or mistake. 2. To remind someone of one's failure or wrongdoing. 3. To keep reminding about something unpleasant they don't want to think about
An expression of surprise or shock, uttered when one does not know what to say: for example, “On their wedding day, she went to have breakfast with both of her former husbands—well, words fail me !”