“Casual tea” is a pun on the word “casualty.” “Count of casualty? Or cup of casual tea?” was posted on Twitter by Laura Briggs on April 27, 2009. “What does a stressed out doctor drink? Casual tea” was posted on Twitter by LeFonk on May 10, 2012. “What did the stressed out hospital nurse drink? - Casual tea” was posted on Twitter by John Collins on May 17, 2012.
   
“My first date with an Emergency department nurse was a casual tea” was posted on Reddit—dadjokes on October 15, 2018.
 
“Why is the Army so strict on uniforms?”/“To minimize casual tees” is another “casualty” pun.
   
     
Twitter   
Laura Briggs
@Laurashmlaura
Count of casualty? Or cup of casual tea?
5:23 AM - 27 Apr 2009
   
Twitter 
Neil Carhart
@NeilCarhart
#tvidea : “Casual Tea” - New drama following the lives of doctors and nurses as they take a relaxed break in the hospital cafeteria
10:22 AM - 18 Jan 2010
 
Twitter
Simon
@intruth
The answer was Casualty. “Casual Tea” do you see? I am the Lionel Blair of #twittercharades
6:16 AM - 15 Jan 2010
 
Twitter
Michael Kolberg 🤙
@mikeykolberg
Replying to @aparnapkin
@aparnapkin “Casualty” actually comes from “Casual Tea” because everyone who participated was bored to death.
4:54 PM - 5 Apr 2011
 
Twitter
Katie Heckel
@katieheckel
Spent my afternoon in a hospital room named: casualty. But it is nothing like having casual tea. #delirium
2:43 PM - 16 Dec 2011
     
Twitter 
LeFonk
@LeFonk
What does a stressed out doctor drink?
Casual tea.
12:16 PM - 10 May 2012
 
Twitter
John Collins
@HolyDalek
What did the stressed out hospital nurse drink? - Casual tea.
11:08 AM - 17 May 2012
   
Twitter
You can call me Q
@QuintinForbes
Q: What type of tea do you get in hospital? A: Casual tea.
6:25 AM - 29 Jun 2012
   
Twitter
You can call me Q
@QuintinForbes
Never ask for casual coffee in a hospital. They only have casual tea.
9:19 AM - 2 Jul 2012
   
Twitter
Steve
@SweepFan
What does a stressed out A&E Doctor drink? . . . . Casual tea. #Jokes #Funny #Humour #PlayOnWords #Emergency
12:03 PM - 25 Apr 2013
 
Twitter
Megan Murphy
@magz_murph
The casualty was drinking casual tea in his casual tee.
7:40 PM - 13 Sep 2013
         
Twitter 
Mister Calum
@AslanCanEatYou
A casual tea whilst watching casualty
7:32 AM - 1 Mar 2015
 
Reddit—Jokes
Posted byu/Dukefromearth October 3, 2015
What kind of tea do the crime investigation team drink?
A “casual tea”
 
Twitter
Nubiana 👑
@nubianaliloutee
Mom: Get dressed, we’re going for casual tea.
Me: How casual is casual?
Mom: What?
Me: the tea…
Mom: I said casualty, not casual tea. We’re going to the emergency room.
Me:
12:15 PM - 6 Jun 2018
 
Reddit—dadjokes
Posted byu/johnnydarko- October 15, 2018
My first date with an Emergency department nurse was…
A casual tea
 
Twitter
Neil Wellington
@wildwellie
I had my first date yesterday with an A&E nurse.
It was a casual tea. #1PUN
3:07 AM - 30 Jan 2019 from South West, England