single action 

"Single action" means that the act of pulling the trigger only performs one function: releasing the hammer or striker, which strikes the firing pin or lever against the shell casing.

You'd have to cock the hammer of a revolver, or pull and cock the slide of a semiauto pistol for the trigger to function as single action.

Guns which cock and fire with one pull of the trigger are called double action.

"Who keep the fully-auto verses single action ideal?
Yeah, Hiero - oh they straight, culture merchants we kill"
- Opio, Heiroglyphics, "Mind, Body and Soul"

single action by ShazamVT April 3, 2008

Colt Single Action Army

1. A powerful single action revolver holding six rounds of .45 Colt ammunition.

2. Cannot play Russian Roulette without it.

3. The weapon of the legendary Revolver Ocelot.

Introduced in 1873, no Colt revolver has earned greater fame than the Single Action Army, The Peacemaker.

In design and performance, in line and form, no more sculptural and practical Colt has ever been created.
"This is the greatest handgun ever made. The Colt Single Action Army. Six bullets... More than enough to kill anything that moves. Now I'll show you why they call me... 'Revolver'."

— Revolver Ocelot to Solid Snake in 2005.

Colt Single Action Army by zingeraddict September 29, 2011

Colt Single Action Army

1.a powerful single action revolver holding six rounds of .45 Colt ammunition.

2.Cannot play Russian Roulette without it.

2.The weapon of the legendary Revolver Ocelot.

Introduced in 1873, no Colt revolver has earned greater fame than the Single Action Army, The Peacemaker.
In design and performance, in line and form, no more sculptural and practical Colt has ever been created.

"This is the greatest handgun ever made. The Colt Single Action Army. Six bullets... More than enough to kill anything that moves. Now I'll show you why they call me... 'Revolver'."
— Revolver Ocelot to Solid Snake in 2005.

Colt Single Action Army by zingeraddict October 14, 2011

single barrel pump action yogurt rifle 

euphamism for the male sex organ.
Thanks to Chris Finch from the TV series the office.

''The next minute they were sucking on my single barrel pump action yogurt rifle''

single barrel pump action yogurt rifle by The Brigstain February 26, 2009

single barrel pump action yoghurt rifle 

another name for your dick,penis,cock,willy, 5th limb, 3rd leg... u get the idea

dont even go there or ill have to whip out my single barrel pump action yoghurt rifle

single barrel pump action yoghurt rifle by mad February 28, 2005

single barreled pump action protein rifle

The male reproductive organ which is often refered to as the penis, wang, cock, dick, knob

dont make me cap you with my single barreled pump action protein rifle

single barreled pump action protein rifle by Andy July 25, 2004

Single Shot Pump Action Yoghurt Rifle 

A penis.

I gagged her, took ten paces back, and got her square in the eye with the single shot pump action yoghurt rifle.

Single Shot Pump Action Yoghurt Rifle by Wazza2404 October 30, 2008