N.

An entity or group of individuals that slay pussy at parties and have sex with many women (notorious in New York City)
On New Years, JM got with 18 girls combined.
by Suavvay May 27, 2010
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To be defensive overly so, and to never admit one was mistaken
My Friend Josh was being so JM the other day, what a dumbass...
Stop being so JM, it was just a joke
by Raypture June 28, 2009
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Girl1: So you <3 MJ? Michael Jackson
Girl2: Yeh I guess, although its JM. ;)
Girl1: Who's JM?

Girl2: My lover. Lover
by Sx<3x May 18, 2011
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somtimes it stands for “Join Me” or it stands for “Jealous much?”
girl: hey jm
boy: k

or

boy: your so ugly
girl: Jm?
by loIaaxx July 2, 2021
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An editor. A composer. A photographer. A filmmaker. A singer. A leader. A very talented person. He can be your friend and can sacrifice his time to help you. He is very shy but when it comes to helping you, he sets it aside. He is very cold to other people but he is very different when he is with his friends. He can be very weird and obsessive when it comes to love, but he will always learn from his mistakes and becomes a better person. He makes sure that he will always be by your side.
Boy 1: Can someone help me? I need help with editing.
Boy 2: JM can help you. He is very friendly.
by secretpersonshhhh June 8, 2021
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Job master when you pull girls constantly
He is the biggest JM here
by January 10, 2021
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JM is a short term for "join me" used in ROBLOX (btw I made this word up pls use the word some day).
The word is also a short term for "Just Messing" (which is not a word I made)
by Mrfanmadeword March 1, 2021
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