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An insult.

Claiming that someone "got no jams" is basically saying that said person is no fun or anything else along those lines.

It's actual origin is unknown, however it quickly became popular when the rapper and leader of the Korean hip-hop boygroup Bangtan Boys (BTS), Rap Monster (RapMon/Kim Namjoo), turned to one of his members (Jimin) during a flight to L.A and said that he "got no jams"
(Jimin being dumb and a camera whore)

J-Hope: Oh, Jimin is very no fun...

Rap Monster: Jimin, U got no jams.
by AdventureTiem101 July 23, 2014
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derives from a korean phrase: "jaemi eobseo" which means no fun or not interesting.
the "jaemi" itself means fun, and "eobseo" can be translated to (there is) no/not.
so basically what you do with it is add "no" in front of the phrase, scratch of the "eobseo" and simplify the pronounciation for "jaemi" into jams

i'm not gonna explain how it's popularized, the result on top of this one can do that just well
by OtakuTaka November 19, 2015
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The most insulting insult in the kpop world pretty much...ever.
The word originates from Rap Monster (BTS). In korean the word fun sound a lot like the english word jams. That is why Rap Mon told Jimin (BTS) that he has no jams. Meaning that he is "very no fun" (J-Hope said this about Jimin).
Saying U GOT NO JAMS means you are telling someone that they are not fun.
JIMIN: I'm done..
J-HOPE: Jimin U very no fun... No fun
by Suga.buga+chimchim January 01, 2017
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A phrase used towards one people to tell them that they are not fun in ones eyeballs but maybe not anothers but they are your baby and you wouldnt give them up for the world
Jimin, U Got No Jams
by Dontuseyouerealname December 11, 2017
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