Green’s Dictionary of Slang

(US) a New York City resident born in Puerto Rico or of Puerto Rican ancestry.

2000		E. Quiñones Bodega Dreams 37: ‘In a few years, why not a Nuyorican president?’.
2008		‘Grandmaster Flash’ Adventures 120: On the way out a Nuyorican dude steps up to me. He's rockin' a Kangol hat, red Pro Keds [etc].