Nathan is one of my favorite pieces of slang that I picked up while living in the FTC house junior year. My roommate was a complex character named J Feezy. A Pittsburgh native, Feezy was always hip to the next big vernacular craze. If anyone had lingo, it was him. I’m not sure, but Nathan may have been his magnum opus, a creation all his own. This is an advanced term, it invariably leads to raised eyebrows and convoluted explanations. Casual use with the uninitiated is not recommended.
na·than [ney-thuh
n]-noun, Na·than Ri·ley [ney-thuhn rahy-lee]
-noun
1. nothing, as in nothing important: Speaker 1: Hey holmes, what’s crackin? Speaker 2: Nathan, just chillin at the crib.
2. vernacular alternate and personification of ‘nothing really’: Speaker 1: Are you doing anything tonight? Speaker 2: Nah, just hanging with Nathan Riley doing fuck-all.
formatting shamelessly stolen from dictionary.com
I believe nathan is also a popular slang term for your wang.