For When You Do Something Wrong: Mea Culpa

People who accept responsibility or blame will often say “I’m sorry,” or “I was wrong.” Others might say, “It’s my fault” or “I apologize.” Often friends use expressions like “That was on me” or “My bad.” Some English speakers may say mea culpa.

Source : https://learningenglish.voanews.com/a/for-when-you-do-something-wrong-mea-culpa/7846622.html