Top Definition
The abbreviated name of English rapper 'Nate Monoxide'.
"have you heard the new nMx album yet? It's crazy!"

"I've been listening to nMx on repeat all week."
by Ill-Icit December 07, 2008
In America, (based in New York) also the name of an online music community called The New Music Exchange.

A free online music community that caters to the independent artist sectors (we will be launching on July 31, 2009 - artists can be apart of the community be registering at our main site at
nmx is not only one web site but a series of them

ex- , nmxmusicgroup,
by dreaded madness July 22, 2009
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