A scabby or calloused set of male / female genitalia or pubic area. The hardened and crustaceous state of the genitalia causes it to grind on their partner's reciprocal pubic area thus causing a grinding sensation.
"Jenny, why are you walking funny?"
"I'm chaffed from Reginald's girth grinder..."
OR
"Reginald, why do you scream when you pee lately?"
"Jenny's girth grinder ripped my tip off..."
"I'm chaffed from Reginald's girth grinder..."
OR
"Reginald, why do you scream when you pee lately?"
"Jenny's girth grinder ripped my tip off..."
by Ham Pony February 24, 2018

When one consenting adult removes their prosthetic eye for the use of their partner as a sexual orifice. The half of the couple entering the socket being the ‘eye grinder’
by Shatwood December 4, 2018

A sexual action in where the male eats a strip of bacon from the vagina, then proceeds to use the grease as lube.
Man 1: "Aye man what kind of shit were you up to yesterday, it was so loud i couldn't sleep."
Man 2: "Lauren let me do a greasy grinder on her."
Man 2: "Lauren let me do a greasy grinder on her."
by rogueshogun June 28, 2017

a butcher that has developed a taste for fetus meat because of goverment experementations. it usually sells for 40$ a pound because it's so hard to get and it's so tender.
by marluxia919 December 14, 2010

by JackinOffSquares December 7, 2021

To not only master surviving in the hood, but to be insanely ripped by doing nonstop calisthenics and having a wolfcut.
Jaden, an urban grinder never gets bullied because people can see his physique and how tough the man is.
by Real YT Tartarus January 15, 2023

by LaBelleEstelle March 12, 2014
