One shot one kill 

The most efficient form of murder with a firearm. One shot one kill means every shot you take is a headshot. Precision shooting. If you spray, you miss and then you die.

Surrounded by an angry mob, AC decided to save ammo by using one shot one kill tactics.

One shot one kill by streets is watchin December 18, 2008

One Shot Paddy 

A name given to Provisional Irish Republican Snipers capable of getting one shot kills on British Soldiers. Most snipers were from Corssmaglen. Most Crossmaglen Snipers used the US made Barrett M90, Barret M82 .50 BMG rifles and the Belgian made Fabrique Nationale (FN) FAL with a high powered rifle scope.

The Brits are getting worried of Óglaigh na hÉireann if One Shot Paddy sees them, they know they are going down.

One Shot Paddy by GalwayIRA July 5, 2012

one shot 

A term used in fanfictions to say that there will only be one body of text. (One chapter)

"Severus Snape struggles to find his way, and redemption, after the war. One shot."

one shot by Domccus June 30, 2006

One-shot 

Writing about a character, place or thing that has been done on a spur of the moment of a fandom or orginal peice. Usually is to short for a short story consisting of only one chapter.

'The writer did a one=shot of Mike's feelings toward his parents.'

One-shot by lgbird April 28, 2005

one_shot_gurl 

Also abbreviated OSG, one of the most wonderful human beings on this earth, video game streamer, may also be the #1 female Fortnite player according to some sources.

Person 1: How did the last game go?
Person 2: It went great! I pulled an one_shot_gurl and got a 14 kill win!

one_shot_gurl by Definitelynotserotonin July 1, 2019

One Shot Scott 

A term for one who is clutch at making the last beer pong shot. often chanted by teammates and observers.

Brian is the best One Shot Scott, if he gets down to one cup the game is pretty much over

One Shot Scott by One shotty scotty March 25, 2009

Hes One Shot Bro!! 

"Hes One Shot Bro" a common phrase from low intelligence teammates in games such as COD, Fortnite, and Apex Legends, this phrase implies that the enemy is one shot when they are clearly full health or invincible with hacks.

Come On Bro! You let me get downed! "Hes One Shot Bro!!" and hes finishing🤬🤬

Hes One Shot Bro!! by Stepbro robby May 18, 2020