So I comes back home, nobody's out but Shorty Doo-Wop
Rolling two phillies together in the Bridge we called 'em oo-wops

from Nas – One Love Lyrics on Rap Genius

Meaning

This scene was famously committed to film in the movie Belly:

Nas comes back to Queensbridge and can’t find anybody except for this kid named “Shorty Doo-Wop” (finally, someone with a name!)

With their loneliness combined, they decide to roll themselves an extra-long blunt with two Phillies cigars. Not a bad choice

“Oo-wop” is not a common term, but it is also heard in the Tribe Called Quest song “Sucka Nigga.” It is used by Q-Tip, who, perhaps not coincidentally, produced “One Love.”

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