It's a meme regrading a card in Yu-Gi-Oh! Called "Mammoth Graveyard" as Konami's 2017 Series 10 PSCT changes "Graveyard" to "GY" in card text.
Mammoth GY

Forbidden GY
by Chadook August 22, 2017
Get the Mammoth GY mug.
When you’re having sex and you cum on her face, cut off her ponytail and stick it to her.
“I gave Jenny the Angry Mammoth last night!”
by LadyWolfer May 25, 2019
Get the Angry Mammoth mug.
When your boy knits a condom, you shit in it and freeze it, then he uses it as a self made "brotisserie"
Jade took Joe's Wooley Mammoth like a pro
by Dr Flailgood November 6, 2021
Get the Wooley Mammoth mug.
A huge dude with a big dick, takes too many steroids, he'll probably die tomorrow
I was at the gym and I saw Cornelius, what a swooly mammoth.
by Superfish210 January 20, 2017
Get the Swooly mammoth mug.
one detention after the other for different purposes
zimbardo : i didn’t do the homework due last night so now i have an after school detention

milgram : no way me too! but i forgot that we have a quiz today and i skipped the lesson

zimbardo : you realise you’re going to get another detention for that now, don’t you?

milgram : i hate mammoth detentions!!
by alevelpsychbeast June 18, 2022
Get the mammoth detention mug.
This term describes an abnormally large amount of breast tissue on a man.
God daaaaamn that guy's like 400 ass pounds and he has some mammoth man milkers!
by coffee_by_the_pot November 27, 2021
Get the Mammoth Man Milkers mug.