When a fat person tries to gas light you.
That fat person was grease lighting me into believing that McDonalds is healthier than normal burgers.
by Swag Man of Swagsylvania May 4, 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

by Eaton Holgoode February 3, 2018

It is a culmination of breast sweat that drips down to the belly button and mixes with the button lint then slides down to the crevices between the thighs and vagina and pools in the asshole then is absorbed into the underwear.
by yuba gold July 3, 2012

To rizz up
by johnshlatt January 28, 2023

The act of absolutely dominating any particular activity, often in such a way that is clearly far beyond all expectation and an individual's perceived skill levels, all the while appearing entirely effortless and natural.
An individual found greasing around can be colloquially known as a "greaser." The act may be called "greasing" for short.
An individual found greasing around can be colloquially known as a "greaser." The act may be called "greasing" for short.
- Spencer: "Man, that math exam killed me."
- William: "Me too. John, how did you do so well? You didn't even study--"
- John: "I was just greasing around!!"
- Nate: "Wait, I'm second on Facebook Tetris now?! How the--"
- Alex: "GREASING!"
- William: "Me too. John, how did you do so well? You didn't even study--"
- John: "I was just greasing around!!"
- Nate: "Wait, I'm second on Facebook Tetris now?! How the--"
- Alex: "GREASING!"
by JustAnotherGreaser August 31, 2011

by Darktris February 7, 2017
