The act of dirty dancing at a fast paced song with the opposite gender, sometimes with the same sex.

Two ways:
1) A guy takes a girl by the hips, moves side to side (hips) and she rubs her booty, while doing this, on his crotch until he gets hard. Guy has control over the girl at all times.

2) Another way to grind is to take a girl from the front and rub both of your crotches together. Same way as #1 but affects girl and guy instead of just the guy. This way is more sexual.
Megan: I grinded with Nick all night!
Cady: Really?!? Was grinding him good or did he get a woody?
Megan: He got one, but I liked it!
by girlfromcanadaeh May 3, 2011
Get the Grinding mug.
middle schoolers favorite dance. When a girl moves her ass in the guys crotch. He gets all hard with his boner and its awesome for both of them. Especially when they both know what theyre doing.
Jen: Did u c william grinding her?
Eliza: Yeah u could tell he was having a boner the minute after they started.
Jen: it looked fun!
by 7thgradeslut October 16, 2011
Get the Grinding mug.
A video game term, and is the name of the process of doing completely unnecessary useless events, most commonly gaining EXP by defeating enemies in a specific area without moving on, to level up.

This often leads to being overpowered.
Sorry... I was grinding in that field over there.
by Ichimoto June 27, 2010
Get the Grinding mug.
Quit grinding on that girl, instead of quit socially dry humping that girl.
by TheDumpsterSucker January 27, 2016
Get the Grinding mug.
A dance where 12 year old boys on vine dry-hump the floor because they cant get real girls.
"I walked in on Cameron grinding in his room after Kim rejected him"
by MakkHi August 17, 2015
Get the Grinding mug.
A repetitive task usually involved in a Massively Multiplayer Online Role playing game (MMORPG) where a character's skill's are based entirely on killing monsters to gain strengths or levels. In most MMORPGs, there is no skill from the player involved, so anyone who plays 20 hours a day of grinding will be stronger than a player who does not. MMORPGs become a game genre filled with those who are too slow to play First-Person Shooters (FPS) or too dumb to play Real Time Strategy (RTS) but want to brag and be 1337 g4m3r so they play 20 hours a day and boast to "n00bs"
me_is_n00b: Johnny, what level are you?

Grinding_Johnny210: I'm level 250+

me_is_noob: wow you are so uber 1337! You must be so good at this!

Grinding_Johnny210: Yea, it's pure skill.

me_is_noob: I wish i could grind like you, unfortunately, I have a life, a job, a car, a girlfriend..

Grinding_Johnny210: You suck n00b!
by dude112233 January 8, 2006
Get the Grinding mug.
When you having sex and you riding back and forth on someone.
I was having sex with Alexia last night and holy shit we was fucking grinding like crazy.
by Grindin December 14, 2017
Get the Grinding mug.