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

Put down the knife

To go vegetarian or more specifically, vegan. Referring to the 2011 documentary 'Forks over knives' in which researchers explore the possibility that people changing their diets from animal-based to plant-based can help eliminate or control diseases like cancer and diabetes.

Girl 1: You are looking so good lately, what's your secret?

Girl 2: I put down the knife.

by my mAin Hack October 1, 2016

honing the knife

exercising to scare off 'bulk', ie: keep the 'edge on the knife', raise ones' 'bargaining power'

judy was out honing the knife for her general well being and of course; to perhaps attract customers!!

by michael foolsley November 26, 2009

gone under the knife

Shaved the pubic region with 1) a razor 2)brother's electric razor 3) dad's electric razor

Brian Keehner told us he went under the knife... but *someone* else hasn't... hmmmm

by Angie Groves January 8, 2004

lick the knife

The act of eating a fart. It is the comeback to "I cut the cheese."

Girl 1: I cut the cheese
Girl 2 to Girl 3: And you can lick the knife.

by The Gus of Guses September 30, 2015

Biting the Knife

"Biting the Knife" is a phase used in place of explaining how you're going to do something risky for no particular reason.

"I'm done contemplating, I'm biting the knife on this one."
"I had to bite the knife and fuck the crackhead even though she prolly have stds."

by leavingamark January 7, 2023

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