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Abbreviation of Sweet Mary Jane- Weed/ Cannabis/ marujuana/ Ganja/ Pot.
1) Dude, pass us the SMJ.
2) That's some good SMJ
by Lad101 February 20, 2014
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A new acronym, meaning So Much Judgment, because whoever came up with the idea that smh was shaking my head instead of so much hate just had it all wrong.
"Hey guys, look at my cool collection of Yugioh cards!"
Pfft, smj.
by Renrut422 November 27, 2013
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an alternative to the abbreviation "SMH" (meaning "shaking my head") SMJ is an abbreviation for Shaking My Junk. One can also SMJ at - something in need of a junk shaking.
Some people just don't know how to drive in the snow. SMJ

My boss wouldn't let me leave early. SMJ at my boss.
by Dalai Lemme January 12, 2018
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Used as an alternative to the abbreviation, SMH (shaking my head), SMJ is "shaking my junk"
People that leave the cap off of the toothpaste really annoy me.

I know...SMJ.
by Dalai Lemme January 13, 2018
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