New York City has lots of acronyms, abbreviations and portmanteaus for various neighborhoods and areas. Here's some of them:
BoCoCa - Boerum Hill, Cobble Hill and Carroll Gardens
DUMBO - Down Under the Manhattan Bridge Overpass
FiDi - Financial District
HoHo - North of Houston Street
NoLIta - North of Little Italy
NoMa - North of Manhattan
A name for the Riverdale section of the Bronx. Not commonly used.
NoMad - North of Madison Square Park
ParkWanus - Park Slope and Gowanus
PLG - Prospect Lefferts Gardens
ProCro - Prospect Heights, Crown Heights
Created by developers to reference the quickly gentrifying area of western Crown Heights (AKA "the safe part of Crown Heights") that borders Prospect Heights
RAMBO - Right Around the Manhattan Bridge Overpass
SoBro - South Bronx
Used by developers for the ongoing gentrification attempts in south Bronx
SoHo - South of Houston Street
SpaHa - Spanish Harlem
In reference to East Harlem, which is also known as Spanish Harlem.
TriBeCa - Triangle Below Canal Street
WiNo - Williamsburg North