Knife in Mattress

A scenario, often playful and sexual, in which a person forcefully stabs a knife into a mattress and uses it as a sex toy, sometimes as part of an act or roleplay, while their partner or praises them.

The term is heavily inspired by a scene in the Book "Lights out" by Navessa Allen in which a character proposes the idea of riding a knife in a mattress.

Eammon i want you to grab a knife and stab it into the mattress and watch me ride it as you praise me.

Knife in Mattress

by Freaky Def August 10, 2025

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Knife

Wasn't the guns because there was a mass shooter and it wasn't attention because he fled and intended not to get caught.

Hym "And getting rid of the guns only stops the people who can afford security from getting stabbed by someone with a Knife. The selfish pundit class wants themselves to be safe while they hire security for themselves and then the rest of you can just get killed in a mass stabbing or something. And he had guns. The guns did nothing to save him there. It's not the culture because he's culture is being a solipsistic incest cultists who believe the sane people are the ones who think they are immortal and that a magical reality man made the the boss of everyone by proxy. So no. The cause of the murder is whatever the cause of the murder happened to be and NOT WHATEVER SELF-INDULGENT BULLSHIT THE INFLUENCER FILTH HAS DECIDED TO MAKE UP IN RESPONSE TO THE MURDER OF ONE OF THEIR OWN. One side says it's one thing. The other side says it something else. They can't both be right. All I know this that MY thing persists. And that's all that matters."

by Hym Iam September 12, 2025

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Poop knifing

The act of cutting your poop in half while shiting. This is done by clenching your anus with great force to separate the poop in half. Some people will jokingly say they can separate there

I had to start poop knifing due to the sheer length of my poop.

by Poop knifing September 24, 2025

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Saskatchewan Butter Knife

An orgy of 5 or more men, all fucking in a circle, each with a dick up there ass and them putting their dick up the next person's ass, usually done while laying on their right side.

Yo, you wanna join me in the group Saskatchewan Butter Knife

by Schrodinger's Muppetboi November 2, 2025

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1 girl 1 knife

a girl useing a kitchen knife to masturbate, yeah there really no way into sugarcoating it

the girl is literally useing the sharp point of a KITCHEN knife to "Pleasure" herself, Luckily, (maybe) there no blood, just a stupid girl recording at a weird angle as she puts a knife to her pussy, might be fake now that I think about it but than again I cant really tell

HEY! WATCH THIS KEWL VIDEO?
huh?
*shows 1 girl 1 knife* (man fuck you how am I suppose to make a good way to add 1 girl 1 fucking knife into a sentence, I'll like to see you try better)
ew.

by Zalo_r November 5, 2025

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put the knife down

This term means “Stop hurting yourself or others while you are ahead”

Usually said by someone viewing a situation from the outside.

“Hurt” pertains to all possibilities of stress, pain, and anything alike.

Mark broke up with Liv and he just kept leading her on, he wouldn’t put the knife down.

Liv kept calling Mark out on things that were out of their control, Liv couldn’t put the knife down.

by sound recollection December 2, 2025

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