Mea culpa is a Latin phrase that means ‘my fault’ and is an acknowledgement of having done wrong.
The expression is used also as an admission of having made a mistake that should have been avoided, and may be accompanied by beating the breast as in its use in a religious context.
I confess to almighty God
and to you, my brothers and sisters,
that I have greatly sinned,
in my thoughts and in my words,
in what I have done and in what I have failed to do,
through my fault, through my fault,
through my most grievous fault;
therefore I ask blessed Mary ever-Virgin,
all the Angels and Saints,
and you, my brothers and sisters,
to pray for me to the Lord our God