silent duck 

The shape the hand makes while fisting.

Dude, your mom is soo freaky she begged for the silent duck and now my watch is missing

silent duck by Super Flynn December 27, 2007

silent duck 

A hand gesture used by those engaging in the act of fisting as a way of initiating the partner

Claire whipped out the silent duck, and immediately Joanie screamed in anticipation and excitement.

silent duck by Jebediah Smith December 7, 2007

Silent duck 

The hand shape you make, shaping your hand like a ducks beak, so you can slip inside another person to begin fisting.

“Slide that silent duck in I’m ready for action”

Silent duck by Iron Wombat October 5, 2021

Silent duck 

The act of inserting a four fingers into ass while inserting the thumb in the pussy creating a bill with the hand preforming a "QUACKING" motion with the hand. Can be done vaginally with the thumb on the clit or in the ass.

This is precursor to fisting. Beginners fisting technique.

Other names in reference to. "The Quacker" "Duck BIll" "The howling wolf"

Jenny let me silent duck her last night. She wasn't very silent.

Silent duck by FellatioJones May 10, 2018

The Silent Duck 

1: The Silent Duck

- The shape a hand tends to employ to participate in the act of fisting at the point of entry, this later branches out into the full fist.

2: To Silent Duck:

- To threaten an enemy with the Silent Duck shape, they will then know that you definately mean business and will desist immediately.

1.
Joyce - "That dude fully attempted to use The Silent Duck on me last night, I wasn't having any of it with my monster cunt!"
Barbara - "You go girl."

2.
Dave - "Sup chaps"
Jack - *SILENT DUCK*
Dave - "Okay guys I know where my place is..."

The Silent Duck by Dr. M. Edal December 4, 2007