The meaning of the Acronym MJ is...

MJ is

• Mass of Jupiter
• Mechanical Joint

More Meanings For MJ:

• Media Java
• Mini Java
• Mouth Job
• Mighty Jack
• Major Jerkoff
• Mental Jacker
• Martin Jarvis
• Martin John
• Margaret Jane
• Maria Jose
• Michael John
• Mike Joseph
• Mary Jayne
• Melanie Joy
• Meridith Johnson

MJ is also in:

• Adults
• Funnies
• General
• Names and Nicknames