Grandma's yellow dentures 

Getting a blowjob when the the person giving the BJ bites the foreskin of the penis, circumsizing it. the "bj giver" then eats it and poops it into the nostrils of the person recieving the blowjob. they sneeze it into a cup and have their grandma drink it with a cat or dog humping the grandmas leg.

the other day me and my girlfriend decided to try grandma's yellow dentureson... good thing im not jewish!

Grandma's yellow dentures by hungryasian&cheweyguido June 17, 2010

yeezy grandma 

Yeezy Grandma: a grandma trying time use “cool kid” slang and being an epic gamer B)

Wow your acting like such a Yeezy Grandma right now.

yeezy grandma by LitlleShrimp;) September 19, 2020

14 year old grandma 

A grandma that is so extra and picky that she is mentally 14 years old, you can see her procrastinating and being problematic the majority of the time

Person: gosh I have such a 14 year old grandma
Person 2: omg really all I’ve seen her do is sleep, complain and play candy crush!

14 year old grandma by The420microwave January 4, 2022

I had yer grandma last night 

It litterally means "I had sex with your grandmother last night."
It just removes the word 'sex' to make it shorter, like any other slang term.

Ryan: "Yo man, what were you doin' last night?"

Jack: "I had yer grandma last night"

Ryan: "What the hell man?! That's sick!"

I had yer grandma last night by jeNANANANANAA BATMAN! April 11, 2009

heck yes grandma 

phrase that means 'of course, keep up!'
or a phrase said in excitement of achieving a goal.

"Did you watch The Hills last night?!"
"Heck Yes Grandma!"

Or in other cases..

A young boy wins a game of uno and in a cheerful tone says "Heck Yes Grandma!"

heck yes grandma by Sydney L. R. October 17, 2009

grandmasexual 

A person primarily sexually interested in grandmothers or senior citizens in general.

"You caught Nick Nolte in that retirement community? Doin' WHAT? Homeboy's a grandmasexual!"

grandmasexual by The Decider/Definer/Defiler March 24, 2010

grandmapedia 

Similar to wikipedia, though not anywhere near as factual. Grandmapedia is knowledge that is not available on the internet, as Grandma is not connected to the Internet and generates her own facts and content.

Grandma: The Rolling Stones band is very well educated. You know Mick Jagger has two PhDs.
Daughter: No, mom. I don't think that is accurate.
Grandma: Yes it is. The whole band is highly educated
Grand daughter: I find that hard to believe.
Grandma: Keith Richards also graduated with some great degrees.
Son: I believe that this is factual according to grandmapedia, though may not be available on wikipedia.

grandmapedia by the comand'r February 2, 2018