“Money Makin’ Manhattan” is a similar rap nickname.
 
Wikipedia: Mount Vernon
Mount Vernon is a city in Westchester County, New York, United States. It is an inner suburb of New York City, immediately to the north of the borough of the Bronx. As of the 2020 census, Mount Vernon had a population of 73,893, making it the eighth most populous city in the state (2010).
   
Wikipedia: Heavy D
Dwight Arrington Myers (May 24, 1967 – November 8, 2011), known professionally as Heavy D, was a Jamaican-born American rapper, record producer, and actor. Myers was the leader of Heavy D & the Boyz, a group that included dancers/hype men G-Whiz (Glen Parrish) and “Trouble” T. Roy (Troy Dixon), as well as DJ and producer Eddie F (Edward Ferrell)
         
OCLC WoprldCat record
Mr. Big Stuff
Authors:Heavy D (Performer), Boyz (Musical group) (Performer)
Music LP, English, ℗1986
Publisher:MCA Records, Universal City, Calif., ℗1986
   
Genius (lyrics)
Mr. Big Stuff
Heavy D & The Boyz
Track 1 on Uptown Is Kickin’ It
Produced by Andre Harrell
Release Date 1986
View All Credits
(...)
[Verse 4: Heavy D]
Now I’m the swing beat artist with skills to kill
Money earnin’ Mt. Vernon’s where I live and chill
 
OCLC WorldCat record
Don’t you know ; Moneyearnin’ Mount Vernon
Authors:Heavy D (Performer), Boyz (Musical group) (Performer)
Music LP, English, ℗1988
Publisher:MCA Records, Universal City, Calif., ℗1988
   
Newspapers.com
14 June 1987, Sunday Journal-News (White Plains, NY), “Rappin’ all the way to the bank” by Gordon C. Williams,  Suburban People sec., pg. 8, col. 3:
“I’m a swing beat artist
with skill to kill
Money-earnin’
Mount Vernon
is where I live and chill”
—Lyrics from
“Mr. Big Stuff”
by Heavy D
 
Genius (lyrics)
Moneyearnin’ Mount Vernon
Heavy D
Track 7 on Living Large
Featuring The Boyz (Hip-Hop)
Produced by DJ Eddie F & Teddy Riley
(...)
Get up, party people, listen to this rap
Cause I’m about to go down and put my town on the map
MC Heavy D, delighted you’ll be learnin
About the place where I rest, Moneyearnin’ Mount Vernon
(Money, money, money - MONEY) (2x)
       
Newspapers.com
2 April 1992, The Daily Times (Mamaroneck, NY), pg. B1, col. 2 photo caption:
Above, Rich “Love” Stroud, Lee Davis and Armery Ware are members of the rap group F. S. Effect. The group is one of many of the big names in rap to come out of what Fab 5 Freddy calls ‘Money Earnin’ Mount Vernon.
 
Google Groups: alt.rap
Rap Dictionary
nina kristie di maio
May 7, 1993, 5:40:38 PM
union square-kid n play
moneyearnin mount vernon-shabazz, 4th ave, 3rd st-one of the worst corners in
     
Google Groups: alt.rap
Totally Unofficial Rap-Dictionary (Bi-weekly Posting, part 2/2)
Niels Janssen
May 31, 1995, 3:00:00 AM
(...)
Moneyearnin’ Mount Vernon
Shabazz, 4th ave, 3rd street. One of the worst corners in
Mount Vernon - hood hang out, dealers, addicts and Shabazz-
Betty Shabazz ownes a very small fast food place. Heavy D.,
Pete Rock and CL Smooth - 77 hillside straight up columbus hill
make a left in Mount Vernon.
 
Urban Dictionary 
mount vernon
Money earnin’, the sister city of Yonkers. Was part of the town of Eastchester in colonial times.
Mount Vernon is near Yonkers and the Bronx.
by DMX April 24, 2004
 
Urban Dictionary
Mount Vernon
The hoodest place in Westchester. A Blood area, Nickname is Murda Ville, slogan is “Money Earnin Mount Vernon”.
There is only one part of Mount Vernon that is good and that’s Fleetwood. Where the richer people live.
by Notorious R.O.D September 9, 2005
   
Urban Dictionary
Mount Vernon
MurDaVille, Money Earnin’, Mo V., Da Ville, Murda Mount are all the same thing. 1 of 3 NYC suburbs on the north border of the Bronx (Mt.Vernon, Yonkers and New Rochelle). Consists of 3 main neighborhoods: Fleetwood, Chester Heights, and Da Ville. Fleetwood is rich people (from what I hear), Chester Heights is too, and Da Ville is the ghetto. There is one project on 3rd and 7th called Levister Towers. Everywhere else in Da Ville is depressed and ghetto. The only 2 shopping centers are The Ave. (4th Ave.), and Gramatan Ave. Rich, white folks go to Gramatan to shop, hood people go to the Ave. Has the highest crime rate in Westchester county. Also has a higher crime rate than NYC(check the stats). Home of world famous strip club Sue’s Rendezvous. Childhood home of up and coming rapper PureComp. More recently, the home to the MurDaVille Bloods, mainly on 3rd and 3rd. Only 4.2 square miles. Rejected by NYC and Yonkers. Yonkers people swear they better than us. Guess what? You’re not. Start a conversation with anybody 4rm Y-O and the first thing they’ll say is, “Well in Yonkers…” MURDAVILLE STAND THE F**K UP!!!!! S. FULTON AVE. ALL DAY!!! R.I.P. 2-5.
(...)
by PureComp187 February 1, 2007
     
YouTube
Heavy D & The Boyz - Mr. Big Stuff (Official Music Video)
HeavyDAndTheBoyzVEVO
Oct 7, 2009 #HeavyD #Remastered #MrBigStuff
REMASTERED IN HD!!
Official Music Video for Mr. Big Stuff performed by Heavy D & The Boyz.
 
YouTube
Heavy D & The Boyz - Money Earnin’ Mt. Vernon
HeavyDAndTheBoyzVEVO
Oct 8, 2009
Music video by Heavy D & The Boyz performing Money Earnin’ Mt. Vernon. (C) 1989 Universal Records Inc.