The combination of the first part of dude that makes the do sound and man which is changed to sound mane (like a lions mane) for more effectiveness in speech. Not meant to be derogatory. It can be used as a greeting like "Dude!" or as a replacement for a name (see examples).
by Jade the Number One Son May 18, 2011
by JP Daley February 9, 2008
by uhhhhhhhhhhhhhhh June 28, 2006