on the grind 

staying "on the grind" means to work hard, always be hustling, or otherwise engaged in money-making or woman-procuring activities.

people who were once poor and become wealthy might then become lazy and indolent and spend all day in champagne-filled jacuzzis whereas other newly-successful people might continue to work hard, thus "staying on the grind"

there are many examples from 50 Cent's latest release, "the Massacre", but i'll offer up two:

excerpt from "God gave me style":

A O.G. told me God's favorites have a hard time
You out the hood, that's good now stay on the grind


Chorus from "Bitch get in my car":

I got no pickup lines
I stay on the grind
I tell the hoes all the time
Bitch get in my car (Bitch get in)
I got my 64, ridin' on Dayton spokes
And when I open that do'
Bitch get in my car

on the grind by Jeff Urban (seriously, that's my real name) April 11, 2005

On the grind 

Doing something for a long period of time.

Man 1: What have you been doing all day?
Man 2: I've been on the grind. The Fortnite grind.

On the grind by MogOurGirl October 20, 2018

on the grind 

To sell illegal drugs late at night.

You want to pick up now? At this time of night? Nah, dawg. I don't know anyone who's on the grind in this area.

on the grind by Gormonster January 13, 2011

on the grind 

Grinder - Grinding it Out- On the grind

1) A player player who puts in his poker hours in a job-like way

2) Grind it Out, on the grind: working particularly hard, like when experiencing
an unlucky run of cards, to make an acceptable return on your time invested;
or when making a solid return when playing from a small bankroll at lower limits

Poker Pro's: Mugsy Russo is on the grind , The grinder Michael Mizrachi, Phil Ivey is grinding it out on the tournement circuit

"He Quit his job to become a grinder , he just won the world poker tour"

"what do you do for a living?"
"I'm on the grind"

"Today I'm grinding it out at the poker room."

on the grind by Boz Conti October 6, 2008

on the grind 

A term used to describe the act of playing Call of Duty. However, in order to be truly on the grind, you must not only experience the insatiable urge to do work, but also run shit for at least 2 hours. You cant be on the grind, or grinding, if you play any less. And for most of us, we'll stay on the grind a lot longer.

(a)"You off work yet?"
(b)"Yeah, just got home."
(a)"You on the grind?"
(b)"You know it, been murkin scrubs."

(a)*cough cough cough*-"Damn that shit is fire"
(b)"Time to get on the grind"
(a)"No doubt. The sticks are calling"

on the grind by etopp June 24, 2010

On the Grind 

A hardcore athlete in any sport who pushes his or her ability to no end. Someone exceeding their physical limitations to push for victory. A person who is in a zone, focus playing a sport.

The pool player is "On the Grind" playing eight hours a day.

On the Grind by progunfighter June 27, 2018

get on the grind 

Do whatever you got to do to get that paper.

Yo I'm slipping on the job. I need to get on the grind.

get on the grind by Moe(All 'bout dat paper) May 11, 2006