Mercy grind 

When a gentlemen offers to dry hump a girl's ass on the dancefloor when no one else is willing to. An act of true selflessness, primarily aimed at raising said girl's self-esteem.

I felt sorry for that girl last night, shaking that ass all night without a dick to park it on. So I gave her a mercy grind.

Mercy grind by Baby benz secretary July 4, 2009

Double Quad-Roller Bumpin' Grind 

When two quadruple amputees, strapped to skateboards have sex.

The Annual Amputee Orgy/Tent Revival ended in a Double Quad-Roller Bumpin' Grind under the pulpit.

Double Quad-Roller Bumpin' Grind by Super Guatemala Man February 18, 2008

double grind 

when a girl is grindind with a guy in front of her and another guy in back of her at the same time. the guy in front pushes his dick near the girl's pussy and the guy in back pushes his dick up the girls ass while she dances sexy

1: wow look at kate doing a double grind!
2: yeah she is such a slut
1: your just jelouse because you could never grind with 2 guys at once.
3:(kate)hey guys hows it going?
1: good, it looked like you were getting a lot of action out there
3: yeah i am so horny!! James and chris are going back to my house to have a threesome. want to come?
2:sure!

double grind by club dancer November 11, 2006

The Grind 

The grind never stops until the force of friction stops it. This in no way means hustling as some may try to define it as. This is a component of physics.

The grind of the rusty cogwheels did not stop until the the force of friction overwhelmed motion.

The Grind by The New England Puritan June 1, 2015

party-grind 

grindcore that is all about the party.

dr. acula is a party-grind band

party-grind by smoke a blunt2452 December 9, 2008

chill it and go grind 

to slack off from work and enjoy oneself, preferably through the medium of surfing...

one surfer dude says to another, "let's chill it and go grind"

chill it and go grind by The Vlad March 17, 2009

Fake Grind 

When someone pretends they are grinding, but are actually not. Similar to procrastination.

'He said he was going to do work, but I caught him playing fortnite. He is on the fake grind'.

'CLane is never grinding. He is always on that fake grind.'

Fake Grind by Grif98 June 16, 2018