Mack the knife

To sneakily surprise your significant other while they are sleeping by suddenly stabbing your penis into their anus at night. Quick, Efficient, and sneaky, just like the real Mack The Knife

“I heard Andrew he pulled a Mack the knife on his girlfriend Jenny Diver to surprise her”

by Dr retard September 4, 2022

fort knife

When people choose to mock Fortnite and Say "Fort knife"

1. Everybody plays Fort-knife these days
2. "Do you play Pub-g?" No I play Fort knife

by Turtles R awesome July 1, 2018

Push that knife

When you applying pressure to someone and about that action when you ready.

John: Aye if push comes to shove when you got beef with somebody what you do

Elliott: I'm going to push that knife you heard b.

by Rainiervista30 January 4, 2022

Knife Forker

Placing the blade of a knife through the tines of a fork at a right angle. Reminiscent of a slingshot or catapult. Best when accompanied by shooting sound effects.

My son Jack entertained himself at the restaurant last night by making a knife forker with his silverware.

by Ms. Little May 13, 2010

radio knife

Radio knife is two homosexual males having intercourse while watching the TV show "friends" and not using vaselin when they enter the anal cavity

Isaiah and Aaron did the radio knife no homo tho jk super fucking homo :(

by Sus máster OG April 12, 2017

Knife nipples

When a male/female breast are super perky

Andrea has the sharpest knife nipples I have ever seen.

by Zonguestu August 29, 2017

Real Knife

Definitely not a toy knife, neither a full one.

Real Knife

by RoseRed669 January 22, 2023