It means mine
M8= mate
M9=mine
Hey mate that toy is M9
by Hayd18 December 8, 2014
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Equivalent to m8, which is obviously short for "mate" mostly used in by immature 12 year olds or in dank mlg montages.
u fokn wot m9?
ey m9 ur mem es e bich
haa m9 eh liek ur bich en wee fukd
by Dank_Shrekmaster69 November 3, 2016
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A version of m8 spelled incorrectly, sometimes on purpose as a joke. m8 (m-eight), short for mate is often used in in-game chat on consoles and PC to be as efficient as possible when communicating.

Mountain-Dew fueled and sleep deprived, childish gamers sometimes lose all ability to type correctly when raging and type m9 instead of m8. An unavoidable typo when blinded by rage because 8 and 9 are next to each other.
xXx_Xavior_xXx: If u keep hackin, imma report u

johnthetortoise: not hackin, pure skill scrub

xXx_Xavior_xXx: wtf u killed me again, imma report u m9, stop
by ThatRegret February 16, 2015
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when some one is even better than a mate. can also be used for great, gr9, hate, h9, etc.
the value decreases or increases depending on how much the word applies to the situation, eg, gr7 would mean something not too great
person1: hey i brought food
person2: m9
by spokeydoke February 13, 2017
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alternative to m8.. a piss take really, but you love it.
i got into the gig last night for free
how good m9
by Bethan Heslop February 16, 2005
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The word that fucken cuntsucks fucken use to fucken address each other.
Eyy m9 remember that one time after soundwave, m9? I nearly fucken died from having sex with that marsupial on top of a moving train moving through alice springs, eyy that was so fucken alpha, m9.
by Oi Jeru August 21, 2012
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When a newb tries to be a smart arse when calling you mate abbreviated as m9 instead of m8 just to piss you off. More commonly when playing an FPS such as Battlefield or CoD.
Newb: "Nah blow them up m9"

Veteran: "Nah f*ck off m8"
by RoboticRansom May 10, 2016
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