Mamma mia

interjection

Mam·​ma mia ˈmä-mə-ˈmē-ə 

—used to express strong feeling (such as pleasure or surprise)

Mamma mia! My deepest wish has come true. I have a son!

—R. Eugene Jackson

Word History

Etymology

borrowed from Italian mammamìa, mamma mia, exclamation expressing annoyance, fatigue, fear, etc., literally "my mother!"

First Known Use

1860, in the meaning defined above