in the subject line of an e-mail, (nm) stands for no message. that is, the sender is so to the point that he needed only the subject line to express himself, so there's no need for the reader to open the (blank) message.
Subejct: Your house is on fire. Run for cover. (nm)
by Zen06 June 19, 2005
not much. shortened version of not much. used on msn, etc for lazy people who cant be arsed to type the full word.
"hey billy wat up?"
"nm, u?"
by hello-ther-sailor!! November 26, 2006
not much
what's going on?
by kevely and sam March 08, 2003
Nautical Mile.
A unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude.

1 NM = 1.15078 MI
Pilot 1:How much further until our waypoint?
Pilot 2:About 16 nm
by green-poo December 31, 2009
Probably the most annoying excuse of a word ever invented. Used mostly in Instant messengers and text messaging it is a way for the other person to show you that they could give a shit about what you think/do/exist etc... it stands for "nothing much" and should never be used by any man or woman. and if used tell them they are a fag and should go kill themselves.
Bob: yooo.
Fred: Eyy whats good kid?
Bob: nm.
Fred: Your such a fag man you should go kill yourself.
by I69HARD!!! November 24, 2009
A way to kill an unwanted conversation which usually occurs with someone you dont like!

NM=Nothing Much
Guy1: Hey Man Whats Up?

Guy2: NM

Guy1: Oh i see how it is Asshole! way to kill the convo!
by B_RAD69 May 26, 2009
A useless 2 letters which can mean one of he following two things when somebody asks whats up?

Not much.

Or the more common one of..

I cant be bothered to tell you, so no much.

It is a real conversation maker which could lead you no to the same conversation you always have.
Person A: Hi
Person B: Hi
Person A: Whats up
Person B: NM, you?
Person A: NM
Person B: Cool
by Ryan Riggs September 19, 2007
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