in action 

Engaging in sexual activity. Common in 1980s Britain.

I've seen your mum in action.

in action by anon-y-mouse17 September 11, 2018

Killed in Action 

When you’re running to take a shit, but it slips out before you reach the toilet

Mom: “The dog shit on the living room carpet again”

Guy1: “That wasn’t the dog mom, I was killed in action”

Killed in Action by cochiserock143 January 27, 2022

Bitch in Action 

Bitch in action is a bitchy action done by a bitch.

Haley: That bitch totally ratted me out in front of the WHOLE class!

Michaela: It's true! I witnessed it!

Haley: Oh my god! You witnessed a bitch in action!

Bitch in Action by sunshinepie February 27, 2009

awesomeness in action 

Noun. Something amazing, wonderful, and/or marvelous.

After hearing Lauren & KC's song 'Rollin in da Money', everyone exclaimed, "Wow! That song is awesomeness in action!"

awesomeness in action by Lauren (aka L-Moe) October 16, 2004

back in action

When a person's arm are held back so that their shoulder blades can be used for sex. Not unlike tit fucking someone's back.

"Listen to Back in Black while doing back in action. It's like a ride down a citrus mountain."

back in action by Herschel Quintron December 29, 2003

Cristains in action 

The Fucking CIA

u stupid CIA diplodink

Cristains in action by Larry April 23, 2004

Evolution in action 

A rhetorical observation made whenever another human is observed to be making an expensive or potentially fatal error.

Person A: I'm going to put all my money into dotcoms
Person B: Evolution in action, man

Employee A: Bob showed up drunk again to work today
Employee B: Evolution in action

Action: Motorcyclist riding without helmet
Person: Evolution in action

Evolution in action by srnsf April 6, 2006