bumping and grinding 

The action of dancing which requires the buttocks to tease the the groin of the partner...in which the dancer is dancing with.

There was alot of bumping and grinding going on in da club!

bumping and grinding by Cheese and Colon June 3, 2006

Grinding 

Also Known As Dirty Dancing. When a girl is rubbing her ass all over a guys dick until it comes to the point where he gets a woody

i was grinding with this girl with the biggest booty

Grinding by ___ October 18, 2003

Grinding the Corn 

Sexual technique. See the example.

From Six feet under (ep. 48):

(Jimmy and Claire in the bed, obviously after quite a good job..)

Jimmy: You know what is's called?
Claire: It has a name?
Jimmy: Grinding the Corn.
Claire: Grinding the Corn? What's the corn?
Jimmy: You know, with like a mortar and pestle. Only you push the pestle against the rim of mortar. Not in the bowl.
Claire: Oh.

Grinding the Corn by MichalMedved January 23, 2005

Scoop Grinding (Scooping)

When grinding, the girl drops to the ground and rolls up slowly with her butt pointed out in a ice cream scooping motion. Extremely enjoyable to watch and feel by the guy.

"Dude, that girl was scoop grinding (scooping) me so many times last night it was so hot!"

Scoop Grinding (Scooping) by dwreck313 February 23, 2012

face-grinding

Grinding on someone's face.

face-grinding: It's Eating Pussy!!

face-grinding by sitting on your face December 25, 2015

Grinding virginity

The state of being which someone possesses when they've never grinded before

Can be used for girls or guys

Most people lose it in their later teens, but this can vary

Everyone remembers the night that they lost it, usually as one of the best nights of their life

Guy: Dude I've never been to a club before how do I...

Guy 2: Go grab a chick and see for yourself

Guy: Ah there goes my grinding virginity

Grinding virginity by Wakatapillows2 April 19, 2010

Grinding 

Grinding is the most popular form of dancing with somebody of the opposite sex. It is when a guy gets behind a girl and the girl rubs her ass all over the guys front. It can be very intimate but can also get pretty crazy on faster paced songs.

Guy 1: Dude, I got so much ass tonight!
Guy 2: Grinding is the best thing ever!
Guy 1: Good thing we were wearing compression shorts or they would've definitely felt our dicks.
Guy 2: Hell yeah, I was hard as a rock!

Grinding by mbo23js November 3, 2013