An oily, malodorous substance found in the folds and cracks of one's butt. Typically found after a hasty wipe and/or following a rigorous workout routine. Similar to butt cheese or duck butter. Could also be a prime ingredient in the making of truffle butter.
Noun: I itched my butt and retrieved a healthy dollop of Rump Grease.
Verb: My girlfriend Rump Greased my driveshaft. I had to take an immediate shower. It itched for a week.
Verb: My girlfriend Rump Greased my driveshaft. I had to take an immediate shower. It itched for a week.
by Doc184 August 8, 2016

by Nipple_Grease April 13, 2017

by Mersyside 123 August 15, 2021

The shit smear left on the back of the toilet seat. Commonly caused by explosive diarrhea or incorrectly positioning your asshole.
"At last year's company holiday party I got so drunk I accidentally left a grease shingle."
"I took this girl home from the bar last night, when I woke up she was gone...but the skank left me a grease shingle as a parting gift." #greaseshingle
"Donald Trump's hair looks like a grease shingle."
"Yo bro, quit being such a grease shingle."
"I took this girl home from the bar last night, when I woke up she was gone...but the skank left me a grease shingle as a parting gift." #greaseshingle
"Donald Trump's hair looks like a grease shingle."
"Yo bro, quit being such a grease shingle."
by M&TfromtheDeli June 28, 2016

v. Arranging in advance for a supposedly impartial decision to be made by a jury, an employment office, the senate etc. Often a criminal activity.
..............
..............
I may not be home for supper. Me and Rudy will be greasing congress until late. Again.
Okay. I’ll just leave the burgers in the fridge. Again.
Okay. I’ll just leave the burgers in the fridge. Again.
by gnostic3 December 27, 2019

To swap the poop grease of one's asshole with the asshole grease of another by scissoring each others o-rings together
"Let's lock these buttholes together and grease swap!". Can also be used as "Let's lock these buttholes together and swap some grease!"
by anonymous April 15, 2025

to fuck or have sexual relations
by mosthatedk March 27, 2022
