Grey Matter

An insult commonly used to degrade a person’s intelligence

Wow that Jim has a lot of grey matter up there.

by Jakeman28 March 1, 2020

Grey Matter

A very drab person who wears long, dull, grey attire. Their personality suits the wardrobe.

Billy: Ugh... it's grey matter again.
Sally: She's so boring.

by Earl Annie Edna August 17, 2008

Grey Matter Splatter

-verb.

to engage in the act of ejaculating onto the cranium of a well educated individual.

-"...when I get a hold of that naughty little Physics student I'm gonna splatter on her grey matter...Hoo Yaaahh!!"

"...when he pulled out last night I expected a facial cumshot...but no, he proceeded to splatter on my grey matter....how uncouth!!"

*grey matter splatter...when a dumbass bitch just won't do...*

by BurqaBlowjob October 26, 2009

Grey Matter Core Sample

drilling a hole in someones skull and fucking their brains out.

well Lary i guess im going to have to give your wife a grey matter core sample for letting Fluffy crap on my lawn again!

by wetspongecrosscountry October 20, 2010