One-shot 

A common term used by fps gamers for when they have done very little to no damage to the enemy player.

Guys get him he’s one-shot!

One-shot by ToastToxin July 30, 2021

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_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

one shot wonder 

Someone who gets drunk after one shot, an extreme lightweight.

My friend Jamie is such a one shot wonder, she got shitty at the party after one body shot.

one shot wonder by Sarah and Jamie June 9, 2007

One Shot Johnny 

What you call a dude who can only must up one go in any sort of sexual experience.

"Damn man, did you go all night?"

"Hell no, I'm a One Shot Johnny."

One Shot Johnny by neilruby1 December 7, 2016

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