What does MJ stand for?

Master Jack (slang for Master Corporal, Canadian Forces)

This definition appears very rarely and is found in the following Acronym Finder categories:

Military and Government
Slang/chat, popular culture

Other Resources:

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Male Joint (decision makers) Mango Juice Manitoba Judgments Mara Jade (Star Wars character) Marijuana Mark Jindrak (wrestler) Mark Joyner (internet marketing) Mary Jane (Watson/Watson-Parker; Spiderman character) Mary-Jane (slang for marijuana) Master in Journalism		Master of Jurisprudence Mechanical Joint Megajoules Merge Join Methyl Jasmonate Michael Jackson (entertainer) Michael Johnson (Olympic sprinter) Michael Jordan Mick Jagger (Rolling Stones member) Military Judge

Samples in periodicals archive:

But that wasn't really me CAPTION(S): TARGET: Former science master Jack Royal was shot dead FRESH FACED: Andrew Adams at time of the killing in 1990 FIGHTING ON: Andrew Adams insists he is innocent of the notorious murder of Jack Royal on Tyneside in 1990 TOGETHER: Andrew Adams has found love with Vi Hegna, the new woman in his life

I will fight for cash; Vow to carry on after he was freed

Front row: Neville Fair, Christopher Vincent Shaw, John "Henry" Fletcher, Nick Whitley, form master Jack Hadwin, Ian MacLennan, Dennis Wood, "Little Scoff" Schofield and "Nipper" Gordon Turner.

READER FEEDBACK; FARNLEY TYAS in the 1950s

Master Jack and his colleagues bill themselves as "global leaders in strategic positioning.

Catching up with Jack

CAPTION(S): ON FORM: Lower Sixth Science 1959 with form master Jack Hadwin.

LAND MARK: The first years of Huddersfield New College

Sean Gilbert, who sat out last season in a money dispute with Washington, was denied free agency by special master Jack Friedenthal.

HOT DAWG! BROWNS COMING BACK

The NFLPA will ask special master Jack Friedenthal to remove the franchise designation, making Gilbert an unrestricted free agent.

NFL UNION SEEKS REMOVAL OF GILBERT'S FRANCHISE TAG