A contraction used to condense a six-word phrase (Do you know what I mean ?) into two syllables. Commonly used by those with limited vocabulary to confirm whether their audience is comprehending their babble-speak. Also used to convey excitement, disappointment, or anger about subject matter. Origin: 5 boroughs of NYC.
A'yo son, these chicks from Jersey be gettin' me tight for no reason, nah'mean ?
Short for "Do you know what I mean?"
That shit is off da hee! nah'mean?!