The shit in the creases in between one’s genitals and thighs, generally built up from under garnments or just not washing your junk.
by Nerdarino July 14, 2018

by hystEric631 July 3, 2019

When you have a shitty sitting position while gaming for hours and then you get a line on your stomach.
by A fuckin’ idiot September 10, 2020

by Nick March 30, 2005

Grease crease is the crease in-between the thighs and buttocks/hips from a front vantage point generally visible while a female is seated. This majetic sighting is more prominent on thicker women.
The praxis of sliding your phalanges inside of the Grease Crease while shellacking your bae from the back will warrant a euphoric sensation.
by Phillyman215 December 29, 2016

Girl 1: Blowing John hasn't been the same since he got that assassin's crease.
Girl 2: What do you mean?
Girl 1: There's a huge crease in his dick from wearing those tight jeans.
Girl 2: Oh, my boy has one too, he got ran over by a snowboarder!
Girl 2: What do you mean?
Girl 1: There's a huge crease in his dick from wearing those tight jeans.
Girl 2: Oh, my boy has one too, he got ran over by a snowboarder!
by cockles December 30, 2012

by Gilliams May 23, 2022
