A shortened version of the phrase "Know what I mean".
Commonly
used with males in the ages of 10-20. These males exhibit a need to be cool with the
crowd. This can often work if the objected audience answers "
yes".
However, caution should be used to avoid using the term "nah mean" when the answer
will be "no". This can result in a loss of coolness, thus, defeating the purpose of the term "Nah mean".
Some have also given responses with N' mean. Shortened for the phrase "I know what you mean".
Martin: I hate it when I get killed so fast in Halo. Nah mean?
Andrew: N' mean.
Martin: I think all blondes are dumb. Nah mean?
Andrew: Nope...I think you're dumb.