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

Knife

An Inside Joke In Annoying Orange

Orange: Hey Apple!
Apple:What?
Orange:Knife!
Apple:AHHHHHH*fucking dies*

by mangone June 3, 2023

piss knife

when someone freezes their piss into the shape of a blade and uses it as a knife.

john used his piss knife to carve a Halloween pumpkin

by the cuck champion May 14, 2019

booker knife

When you take a spoon and shove it up your homey’s ass

I just booker knife Kenny’s ass

by Dirty Kenny with a stick up July 18, 2021

Favred up a creek with no nig knife

fucked

When I lost my keys, I realized I was favred up a creek with no nig knife.

by B-O-U-S-S BOSS! March 7, 2011

Cocoa Knife

Nickname of the penis when entering the butt.

We had a few drinks and I fed her the cocoa knife.

by EF Tedenfred May 18, 2010

Noodle Knife

A person who is limp like a noodle in person but behind your back or when you aren't looking will harden up and insult you or act tough.

John is such a noodle knife. He waited until I left to talk bad about me.

by high6ix67 June 16, 2018