NCN- A no-chance-nigga.
Meaning: A dude that has absolutely no choice but to be gay because of their extremely high level of ugliness.
Chic# 1: "Girl, a guy just tried to holla at me...It was then that I realized what a total NCN he was!!"
Chic#2: "Hahahaaa....poor thing. Maybe Justin Timberlake is interested..."