Noun - An abbreviation for "no chin, no ass", prevalent among the lameass aging white guy set. Characteristics often include excessive whining, lack of virility and in general acting like someone's grandmother on estrogen therapy.
Dude did you see turtle-looking motherfuc*er grovel like that with that customer? I thought he was gonna cry. Kevin is such a nocnas!
by chris_z December 05, 2005