The act of being sexually stimulated through exesively large nostrils
Mr. mckinly may i Jm you and finish right in those gorgeous nostrils.
by sexystarmanridingyourmother June 24, 2010
13 more definitions
Top Definition
Aim shortcut to say just messin'. see jk
johnny: you're gay
joe: :(
by John Pinkerton December 08, 2005
used on teh internet for "j00r mum"

13370R way of saying ym
omfg jm r 73# u83r 6#3y + j00 oh noes it! OmFgRoFl!
by 8u7r0n r 73# 6#3y mi7 di3 \/( November 22, 2004
jelous much?
Speaker 1 : ugly jeans
Speaker 2 JM
by LipGlass June 09, 2009
short for just messing, successor to jk (just kidding) and jp (just playing)
Boy A: Man I don't know how to tell you this but I assfucked your mom last nite. jm
Boy B: I'm gonna shank you...
by c11234 November 30, 2005

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 26, 2010
An acronym for the word Jerk Move. See Jerk move.
Ughh...Mark is so dumb, he just pulled a JM on me.
by Kagebunshin March 06, 2009
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 27, 2009

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