Mea culpa

"Mea culpa" is a phrase that means "my mistake" or "my fault". It's like when you accidentally spill your juice on the floor and say "oops, my bad!" or when you break a toy and say "I'm sorry, I made a mistake". Adults use the phrase "mea culpa" to take responsibility when something goes wrong, like when they make a mistake at work or say something hurtful to someone. It's important to acknowledge our mistakes and take responsibility for our actions, just like when you apologize to your friend if you accidentally hurt their feelings.