Definition
Alternative spelling of Jesus, Mary and Joseph using a serial comma.
How People Actually Use It
A Catholic prayer used during times of great stress and turmoil; it's also used to express gratefulness when a blessing is received. Often abbreviated as "JMJ".
"1. Jesus, Mary, and Joseph, help all those who are trying to escape war-torn places. Amen. 2. I passed my exam! JMJ, thank you!"
Source: Urban Dictionary