It means "mate"
Used in chats and in forums, that slang is useful
Me: hi m8.
Jonh: hi m8. how are you?
Me: i'm fine, thanks m8
by F4T4L_3RR0R_ April 12, 2009
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"m8" is the Leetspeak version of "mate". Mate means friend, if you didnt know. Its mostly used of gamers and hackers.
Mlg Pro: Get rekt m8!
Noob: nah nah
Mlg Pro: m8, u suc!
Noob: and u swallow
by gtfoeddy May 20, 2016
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It's the short form of mate which is usually used in chatrooms.
hey,m8!how are you?

I'm fine,thanks.what about you m8?

i'm great!
by Dragonom March 12, 2009
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M8 == mate
User1: hey!
User2: hi m8!
User1: play a CSGO round?
by Rhodos32 February 22, 2015
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1) Australian slang, short for mate.

2) A metric screw thread.
3) Motorways in GB, Ireland, Hungary, Armenia, Russia and Belarus.
1)"G'dAy m8" - " h0w r u doiN m8?" - "y@r m8, i neEd a M8 scr€w, m8" - "co0l m8, i'll br!ng u 1 0VeR da M8"
by Luckyleprechaun February 19, 2014
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An abbreviation of the word 'mate'.

This is usually used in texts between good friends.

Sometimes used out of pure laziness, other times just to look "cool".
"Hey Joe!"
"Hey m8, how's it goin?"
by Alyx August 24, 2016
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A word that means mate, often used by cringy people that think they are cool and edgy but just end up looking stupid and lame.
by Fuckingchicken May 25, 2018
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